Axtel, S.A.B. de C.V. Issuer The Subsidiary Guarantors named herein 7⅝ % Senior Unsecured Notes due 2017

Exhibit 4.20

▇▇▇▇▇, S.A.B. de C.V.

Issuer

The Subsidiary Guarantors named herein

7⅝ % Senior Unsecured Notes due 2017

INDENTURE

Dated as of February 2, 2007

The Bank of New York

Trustee

CROSS-REFERENCE TABLE

TIA Section		Indenture Section
310(a)(1)		7.10
(a)(2)		7.10
(a)(3)		N.A.
(a)(4)		N.A.
(a)(5)		7.10
(b)		7.08; 7.10
(c)		N.A.
311(a)		7.11
(b)		7.11
(c)		N.A.
312(a)		2.05
(b)		11.03
(c)		11.03
313(a)		7.06
(b)(1)		7.06
(b)(2)		7.06
(c)		11.02
(d)		7.06
314(a)		4.02;
		4.10; 11.02
(b)		N.A.
(c)(1)		11.04
(c)(2)		11.04
(c)(3)		N.A.
(d)		N.A.
(e)		11.05
(f)		N.A.
315(a)		7.01
(b)		7.05; 11.02
(c)		7.01
(d)		7.01
(e)		6.11
316(a)(last sentence)		11.06
(a)(1)(A)		6.05
(a)(1)(B)		6.04
(a)(2)		N.A.
(b)		6.07
(c)		9.04
317(a)(1)		6.08
(a)(2)		6.09
(b)		2.04
318(a)		11.01

N.A. means Not Applicable.

Note: This Cross-Reference Table shall not, for any purpose, be deemed to be part of the Indenture.

TABLE OF CONTENTS

	Page
Article 1
Definitions and Incorporation by Reference
SECTION 1.01 Definitions.	1
SECTION 1.02 Other Definitions.	27
SECTION 1.03 Incorporation by Reference of Trust Indenture Act	27
SECTION 1.04 Rules of Construction	28
Article 2
The Securities
SECTION 2.01 Form and Dating	28
SECTION 2.02 Execution and Authentication	29
SECTION 2.03 Registrar and Paying Agent	29
SECTION 2.04 Paying Agent To Hold Money in Trust	30
SECTION 2.05 Securityholder Lists	30
SECTION 2.06 Transfer and Exchange	30
SECTION 2.07 Replacement Securities	30
SECTION 2.08 Outstanding Securities	31
SECTION 2.09 Temporary Securities	31
SECTION 2.10 Cancellation	31
SECTION 2.11 Defaulted Interest	31
SECTION 2.12 CUSIP Numbers	32
SECTION 2.13 Issuance of Additional Securities	32
Article 3
Redemption
SECTION 3.01 Notices to Trustee	32
SECTION 3.02 Selection of Securities to Be Redeemed	32
SECTION 3.03 Notice of Redemption	33
SECTION 3.04 Effect of Notice of Redemption	33
SECTION 3.05 Deposit of Redemption Price	34
SECTION 3.06 Securities Redeemed in Part	34
Article 4
Covenants
SECTION 4.01 Payment of Securities	34

SECTION 4.02 Reports to Holders34

SECTION 4.03 Limitation on Indebtedness	36
SECTION 4.04 Limitation on Restricted Payments	38
SECTION 4.05 Limitation on Restrictions on Distributions from Restricted Subsidiaries	41
SECTION 4.06 Limitation on Sales of Assets and Subsidiary Stock	43
SECTION 4.07 Limitation on Affiliate Transactions	46
SECTION 4.08 Limitation on Line of Business	47
SECTION 4.09 Limitation on the Sale or Issuance of Capital Stock of Restricted Subsidiaries	48
SECTION 4.10 Change of Control	48
SECTION 4.11 Limitation on Liens	49
SECTION 4.12 Limitation on Sale/Leaseback Transactions	50
SECTION 4.13 Future Guarantors	50
SECTION 4.14 Additional Amounts	50
SECTION 4.15 Compliance Certificate	52
SECTION 4.16 Further Instruments and Acts	52
Article 5
Successor Company
SECTION 5.01 When Company May Merge or Transfer Assets	53
Article 6
Defaults and Remedies
SECTION 6.01 Events of Default	55
SECTION 6.02 Acceleration	57
SECTION 6.03 Other Remedies	57
SECTION 6.04 Waiver of Past Defaults	57
SECTION 6.05 Control by Majority	57
SECTION 6.06 Limitation on Suits	58
SECTION 6.07 Rights of Holders to Receive Payment	58
SECTION 6.08 Collection Suit by Trustee	58
SECTION 6.09 Trustee May File Proofs of Claim	58
SECTION 6.10 Undertaking for Costs	59
SECTION 6.11 Waiver of Stay or Extension Laws	59
Article 7
Trustee
SECTION 7.01 Duties of Trustee	60
SECTION 7.02 Rights of Trustee	61
SECTION 7.03 Individual Rights of Trustee	62

SECTION 7.04 Trustee’s Disclaimer	62
SECTION 7.05 Notice of Defaults	62
SECTION 7.06 Reports by Trustee to Holders	62
SECTION 7.07 Compensation and Indemnity	63
SECTION 7.08 Replacement of Trustee	63
SECTION 7.09 Successor Trustee by Merger	64
SECTION 7.10 Eligibility; Disqualification	64
SECTION 7.11 Preferential Collection of Claims Against Company	65
SECTION 7.12 Appointment of Co-Trustee	65
Article 8
Discharge of Indenture; Defeasance
SECTION 8.01 Discharge of Liability on Securities; Defeasance	66
SECTION 8.02 Conditions to Defeasance	67
SECTION 8.03 Application of Trust Money	68
SECTION 8.04 Repayment to Company	69
SECTION 8.05 Indemnity for Government Obligations	69
SECTION 8.06 Reinstatement	69
Article 9
Amendments
SECTION 9.01 Without Consent of Holders	69
SECTION 9.02 With Consent of Holders	70
SECTION 9.03 Compliance with Trust Indenture Act	71
SECTION 9.04 Revocation and Effect of Consents and Waivers	71
SECTION 9.05 Notation on or Exchange of Securities	72
SECTION 9.06 Trustee To Sign Amendments	72
SECTION 9.07 Payment for Consent	72
Article 10
Subsidiary Guaranties
SECTION 10.01 Guaranties	72
SECTION 10.02 Limitation on Liability	74
SECTION 10.03 Successors and Assigns	74
SECTION 10.04 No Waiver	74
SECTION 10.05 Modification	75
SECTION 10.06 Release of Subsidiary Guarantor	75
SECTION 10.07 Contribution	75

iii

Article 11
Miscellaneous
SECTION 11.01 Trust Indenture Act Controls	76
SECTION 11.02 Notices	76
SECTION 11.03 Communication by Holders with Other Holders	77
SECTION 11.04 Certificate and Opinion as to Conditions Precedent	77
SECTION 11.05 Statements Required in Certificate or Opinion	77
SECTION 11.06 When Securities Disregarded	78
SECTION 11.07 Rules by Trustee, Paying Agent and Registrar	78
SECTION 11.08 Legal Holidays	78
SECTION 11.09 Force Majeure	78
SECTION 11.10 Governing Law	78
SECTION 11.11 Consent to Jurisdiction; Appointment of Agent for Service of Process; Judgment Currency	78
SECTION 11.12 WAIVER OF JURY TRIAL	80
SECTION 11.13 No Recourse Against Others	80
SECTION 11.14 Successors	80
SECTION 11.15 Multiple Originals	80
SECTION 11.16 Table of Contents; Headings	81

Rule 144A/Regulation S/IAI Appendix
Exhibit 1 – Form of Security

INDENTURE dated as of February 2, 2007, among AXTEL. S.A.B. de C.V., a Mexican corporation (the “Company”), the SUBSIDIARY GUARANTORS named herein and THE BANK OF NEW YORK, a New York banking corporation (the “Trustee”).

Each party agrees as follows for the benefit of the other parties and for the equal and ratable benefit of the Holders of the Company’s Senior Unsecured Notes offered pursuant to this Indenture and the Guarantees thereof (the “Securities”):

Article 1

Definitions and Incorporation by Reference

SECTION 1.01 Definitions.

“Additional Assets” means (1) any property, plant, equipment or licenses used in a Related Business; (2) the Capital Stock of a Person that becomes a Restricted Subsidiary as a result of the acquisition of such Capital Stock by the Company or another Restricted Subsidiary; or (3) Capital Stock constituting a minority interest in any Person that at such time is a Restricted Subsidiary; provided, however, that any such Restricted Subsidiary described in clause (2) or (3) above is primarily engaged in a Related Business.

“Additional Securities” mean, Securities issued under this Indenture after the Issue Date and in compliance with Sections 2.13 and 4.03, it being understood that any Securities issued in exchange for or replacement of any Security issued on the Issue Date shall not be an Additional Security.

“Adjusted Consolidated Net Income” for any period means Consolidated Net Income (1) plus, to the extent deducted in calculating such Consolidated Net Income, depreciation and amortization expense of the Company and its consolidated Restricted Subsidiaries (excluding amortization expense attributable to a prepaid operating activity item that was paid in cash in a prior period) for such period; and (2) less capital expenditures made by the Company and its Restricted Subsidiaries for such period.

“Adjusted Treasury Rate” means, with respect to any redemption date, (1) the yield, under the heading which represents the average for the immediately preceding week, appearing in the most recently published statistical release designated "H. 15(519)" or any successor publication which is published weekly by the Board of Governors of the Federal Reserve System and which establishes yields on actively traded United States Treasury securities adjusted to constant maturity under the caption "Treasury Constant Maturities" for the maturity corresponding to the Comparable Treasury Issue (if no

maturity is within three months before or after February 1, 2012, yields for the two published maturities most closely corresponding to the Comparable Treasury Issue shall be determined and the Adjusted Treasury Rate shall be interpolated or extrapolated from such yields on a straight line basis, rounding to the nearest month) or (2) if such release (or any successor release) is not published during the week preceding the calculation date or does not contain such yields, the rate per year equal to the semi-annual equivalent yield to maturity of the Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the Comparable Treasury Price for such redemption date, in each case calculated on the third Business Day immediately preceding the redemption date, plus 0.50%.

“Affiliate” of any specified Person means any other Person, directly or indirectly, controlling or controlled by or under direct or indirect common control with such specified Person. For the purposes of this definition, “control” when used with respect to any Person means the power to direct the management and policies of such Person, directly or indirectly, whether through the ownership of voting securities, by contract or otherwise; and the terms “controlling” and “controlled” have meanings correlative to the foregoing. For purposes of Sections 4.04, 4.06 and 4.07 only, “Affiliate” shall also mean any beneficial owner of Capital Stock representing 15% or more of the total voting power of the Voting Stock (on a fully diluted basis) of the Company or of rights or warrants to purchase such Capital Stock (whether or not currently exercisable) and any Person who would be an Affiliate of any such beneficial owner pursuant to the first sentence hereof.

“Applicable Premium” means with respect to a Security at any redemption date, the greater of (1) 1.00% of the principal amount of such Security on such redemption date and (2) the excess, if any, of (A) an amount equal to the present value at such redemption date of (i) the redemption price of such Security on February 1, 2012 (such redemption price being described in paragraph 5 of the Securities exclusive of any accrued interest) plus (ii) all required remaining scheduled interest payments due on such Security (assuming that the interest rate per annum on the Securities applicable on the date on which the notice of redemption was given was in effect for the entire period) through February 1, 2012 (but excluding accrued and unpaid interest to the redemption date), computed using a discount rate equal to the Adjusted Treasury Rate, over (B) the principal amount of such Security on such redemption date.

“Asset Disposition” means any sale, lease, transfer or other disposition (or series of related sales, leases, transfers or dispositions) by the Company or any Restricted Subsidiary, including any disposition by means of a merger, consolidation or similar transaction (each referred to for the purposes of this definition as a “disposition”), of:

(1) any shares of Capital Stock of a Restricted Subsidiary (other than directors’ qualifying shares or shares required by applicable law to be held by a Person other than the Company or a Restricted Subsidiary);

(2) all or substantially all the assets of any division or line of business of the Company or any Restricted Subsidiary; or

(3) any other assets of the Company or any Restricted Subsidiary outside of the ordinary course of business of the Company or such Restricted Subsidiary

(other than, in the case of clauses (1), (2) and (3) above, (A) a disposition by a Restricted Subsidiary to the Company or by the Company or a Restricted Subsidiary to a Wholly Owned Subsidiary; (B) for purposes of Section 4.06 only, (i) a disposition that constitutes a Restricted Payment (or would constitute a Restricted Payment but for the exclusions from the definition thereof) and that is not prohibited by Section 4.04 and (ii) a disposition of all or substantially all the assets of the Company in accordance with Section 5.01; (C) a disposition of assets with a fair market value of less than US$1,000,000; (D) a disposition of cash or Temporary Cash Investments; and (E) the creation of a Lien (but not the sale or other disposition of the property subject to such Lien)).

“Attributable Debt” in respect of a Sale/Leaseback Transaction means, as at the time of determination, the present value (discounted at the interest rate borne by the Securities, compounded annually) of the total obligations of the lessee for rental payments during the remaining term of the lease included in such Sale/Leaseback Transaction (including any period for which such lease has been extended); provided, however, that if such Sale/Leaseback Transaction results in a Capital Lease Obligation, the amount of Indebtedness represented thereby will be determined in accordance with the definition of “Capital Lease Obligation”.

“Avantel/Telmex IRU” means the indefeasible right to use certain telecommunications capacity pursuant to an agreement between the Company and Telmex originally entered into on January 2, 2006.

“Average Life” means, as of the date of determination, with respect to any Indebtedness, the quotient obtained by dividing (1) the sum of the products of the numbers of years from the date of determination to the dates of each successive scheduled principal payment of or redemption or similar payment with respect to such Indebtedness multiplied by the amount of such payment by (2) the sum of all such payments.

“Board of Directors” means the Board of Directors of the Company or any committee thereof duly authorized to act on behalf of such Board.

“Business Day” means each day which is not a Legal Holiday.

“Capital Lease Obligation” means an obligation that is required to be classified and accounted for as a capital lease for financial reporting purposes in accordance with GAAP, and the amount of Indebtedness represented by such obligation shall be the capitalized amount of such obligation determined in accordance with GAAP; and the Stated Maturity thereof shall be the date of the last payment of rent or any other amount due under such lease prior to the first date upon which such lease may be

terminated by the lessee without payment of a penalty. For purposes of Section 4.11, a Capital Lease Obligation will be deemed to be secured by a Lien on the property being leased.

“Capital Stock” of any Person means any and all shares, interests (including partnership interests), rights to purchase, warrants, options, participations or other equivalents of or interests in (however designated) equity of such Person, including any Preferred Stock, but excluding any debt securities convertible into such equity.

“Change of Control” means the occurrence of any of the following events:

(1) any “person” (as such term is used in Sections 13(d) and 14(d) of the Exchange Act), other than one or more Permitted Holders, is or becomes the “beneficial owner” (as defined in Rules 13d-3 and 13d-5 under the Exchange Act, except that for purposes of this clause (1), (x) such person shall be deemed to have “beneficial ownership” of all shares that any such person has the right to acquire, whether such right is exercisable immediately or only after the passage of time and (y) such person shall not be deemed to have “beneficial ownership” of any shares solely as a result of a voting or similar agreement entered into in connection with a merger agreement or asset sale agreement), directly or indirectly, of more than 35% of the total voting power of the Voting Stock of the Company; provided, however, that Permitted Holders beneficially own (as defined in Rules 13d-3 and 13d-5 under the Exchange Act), directly or indirectly, in the aggregate a lesser percentage of the total voting power of the Voting Stock of the Company than such other person and do not have the right or ability by voting power, contract or otherwise to elect or designate for election a majority of the Board of Directors (for the purposes of this clause (1), such other person shall be deemed to beneficially own any Voting Stock of the Company held by any other person (a “parent entity”), if such other person is the beneficial owner (as defined in this clause (1)), directly or indirectly, of more than 35% of the voting power of the Voting Stock of such parent entity and the Permitted Holders beneficially own (as defined in this clause (1)), directly or indirectly, in the aggregate a lesser percentage of the voting power of the Voting Stock of such parent entity and do not have the right or ability by voting power, contract or otherwise to elect or designate for election a majority of the board of directors of such parent entity);

(2) individuals who on the Issue Date constituted the Board of Directors (together with any new directors whose election by such Board of Directors or whose appointment or nomination for election by the shareholders of the Company was approved by a vote of a majority of the directors of the Company then still in office who were either directors on the Issue Date or whose appointment, election or nomination for election was approved by the Permitted Holders or by directors previously so approved) cease for any reason to constitute a majority of the Board of Directors then in office;

(3) the adoption of a plan relating to the liquidation or dissolution of the Company; provided, however, that this clause (3) will not be applicable to (A) a Restricted Subsidiary consolidating with, merging into or transferring all or part of its properties and assets to the Company or (B) the Company merging with an Affiliate of the Company solely for the purpose and with the sole effect of reincorporating the Company in another jurisdiction; or

(4) the merger or consolidation of the Company with or into another Person or the merger of another Person with or into the Company, or the sale of all or substantially all the assets of the Company (determined on a consolidated basis) to another Person other than a transaction in which holders of securities that represented 100% of the Voting Stock of the Company immediately prior to such transaction (or other securities into which such securities are converted as part of such merger or consolidation transaction) own directly or indirectly at least a majority of the voting power of the Voting Stock of the transferee Person or surviving Person in such merger or consolidation transaction immediately after such transaction.

“Code” means the Internal Revenue Code of 1986, as amended.

“Company” means the party named as such in this Indenture until a successor replaces it and, thereafter, means the successor and, for purposes of any provision contained herein and required by the TIA, each other obligor on the indenture securities.

“Comparable Treasury Issue” means, with respect to any redemption date, the United States Treasury security selected by the Quotation Agent as having a maturity comparable to the remaining term of the Securities from such redemption date to February 1, 2012, that would be utilized, at the time of selection and in accordance with customary financial practice, in pricing new issues of corporate debt securities of a maturity most nearly equal to February 1, 2012.

“Comparable Treasury Price” means, with respect to any redemption date, if clause (2) of the Adjusted Treasury Rate is applicable, the average of three, or such lesser number as is obtained by the Trustee, Reference Treasury Dealer Quotations for such redemption date.

“Consolidated Interest Expense” means, for any period, the total interest expense of the Company and its consolidated Restricted Subsidiaries.

“Consolidated Leverage Ratio” as of any date of determination means the ratio of

(a) the aggregate amount of Indebtedness of the Company and its Restricted Subsidiaries as of such date of determination to

(b) EBITDA for the most recent four consecutive fiscal quarters ending at least 45 days prior to such date of determination (the “Reference Period”);

provided, however, that:

(1) if the transaction giving rise to the need to calculate the Consolidated Leverage Ratio is an Incurrence of Indebtedness, the amount of such Indebtedness shall be calculated after giving effect on a proforma basis to such Indebtedness;

(2) if the Company or any Restricted Subsidiary has repaid, repurchased, defeased or otherwise discharged any Indebtedness that was outstanding as of the end of such fiscal quarter or if any Indebtedness is to be repaid, repurchased, defeased or otherwise discharged on the date of the transaction giving rise to the need to calculate the Consolidated Leverage Ratio (other than, in each case, Indebtedness Incurred under any revolving credit agreement), the aggregate amount of Indebtedness shall be calculated on a proforma basis and EBITDA shall be calculated as if the Company or such Restricted Subsidiary had not earned the interest income, if any, actually earned during the Reference Period in respect of cash or Temporary Cash Investments used to repay, repurchase, defease or otherwise discharge such Indebtedness;

(3) if since the beginning of the Reference Period the Company or any Restricted Subsidiary shall have made any Asset Disposition, the EBITDA for the Reference Period shall be reduced by an amount equal to the EBITDA (if positive) directly attributable to the assets which are the subject of such Asset Disposition for the Reference Period, or increased by an amount equal to the EBITDA (if negative), directly attributable thereto for the Reference Period;

(4) if since the beginning of the Reference Period the Company or any Restricted Subsidiary (by merger or otherwise) shall have made an Investment in any Restricted Subsidiary (or any Person which becomes a Restricted Subsidiary) or an acquisition of assets, which constitutes all or substantially all of an operating unit of a business, EBITDA for the Reference Period shall be calculated after giving proforma effect thereto (including the Incurrence of any Indebtedness) as if such Investment or acquisition occurred on the first day of the Reference Period; and

(5) if since the beginning of the Reference Period any Person (that subsequently became a Restricted Subsidiary or was merged with or into the Company or any Restricted Subsidiary since the beginning of such Reference

Period) shall have made any Asset Disposition, any Investment or acquisition of assets that would have required an adjustment pursuant to clause (3) or (4) above if made by the Company or a Restricted Subsidiary during the Reference Period, EBITDA for the Reference Period shall be calculated after giving proforma effect thereto as if such Asset Disposition, Investment or acquisition occurred on the first day of the Reference Period.

For purposes of this definition, whenever proforma effect is to be given to an acquisition of assets, the amount of income or earnings relating thereto and the amount of Consolidated Interest Expense associated with any Indebtedness Incurred in connection therewith, the pro forma calculations shall be determined in good faith by a responsible financial or accounting Officer of the Company. If any Indebtedness bears a floating rate of interest and is being given proforma effect, the interest on such Indebtedness shall be calculated as if the rate in effect on the date of determination had been the applicable rate for the entire period (taking into account any Interest Rate Agreement applicable to such Indebtedness if such Interest Rate Agreement has a remaining term in excess of 12 months). If any Indebtedness is Incurred under a revolving credit facility and is being given proforma effect, the interest on such Indebtedness shall be calculated based on the average daily balance of such Indebtedness for the four fiscal quarters subject to the proforma calculation to the extent that such Indebtedness was incurred solely for working capital purposes.

“Consolidated Net Income” means, for any period, the net income of the Company and its consolidated Subsidiaries; provided, however, that there shall not be included in such Consolidated Net Income:

(1) any net income of any Person (other than the Company) if such Person is not a Restricted Subsidiary, except that

(A) subject to the exclusion contained in clause (4) below, the Company’s equity in the net income of any such Person for such period shall be included in such Consolidated Net Income up to the aggregate amount of cash actually distributed by such Person during such period to the Company or a Restricted Subsidiary as a dividend or other distribution (subject, in the case of a dividend or other distribution paid to a Restricted Subsidiary, to the limitations contained in clause (3) below); and

(B) the Company’s equity in a net loss of any such Person for such period shall be included in determining such Consolidated Net Income;

(2) any net income (or loss) of any Person acquired by the Company or a Subsidiary in a pooling of interests transaction (or any transaction accounted for in a manner similar to a pooling of interests) for any period prior to the date of such acquisition;

(3) any net income of any Restricted Subsidiary if such Restricted Subsidiary is subject to restrictions, directly or indirectly, on the payment of dividends or the making of distributions by such Restricted Subsidiary, directly or indirectly, to the Company, except that

(A) subject to the exclusion contained in clause (4) below, the Company’s equity in the net income of any such Restricted Subsidiary for such period shall be included in such Consolidated Net Income up to the aggregate amount of cash actually distributed by such Restricted Subsidiary during such period to the Company or another Restricted Subsidiary as a dividend or other distribution (subject, in the case of a dividend or other distribution paid to another Restricted Subsidiary, to the limitation contained in this clause); and

(B) the Company’s equity in a net loss of any such Restricted Subsidiary for such period shall be included in determining such Consolidated Net Income;

(4) any gain (or loss) realized upon the sale or other disposition of any assets of the Company, its consolidated Subsidiaries or any other Person (including pursuant to any sale-and-leaseback arrangement) which is not sold or otherwise disposed of in the ordinary course of business and any gain (or loss) realized upon the sale or other disposition of any Capital Stock of any Person;

(5) any net, after-tax, extraordinary or non-recurring gains or losses or income or expenses; and

(6) the cumulative effect of a change in accounting principles;

in each case, for such period. Notwithstanding the foregoing, for the purpose of Section 4.04 only, there shall be excluded from Consolidated Net Income any repurchases, repayments or redemptions of Investments, proceeds realized on the sale of Investments or return of capital to the Company or a Restricted Subsidiary to the extent such repurchases, repayments, redemptions, proceeds or returns increase the amount of Restricted Payments permitted under such Section pursuant to Section 4.04(a)(3)(D).

“Consolidated Secured Leverage Ratio” means, as of any date of determination, the ratio of

(1) the aggregate amount of Indebtedness of the Company and its Restricted Subsidiaries that is secured by ▇▇▇▇▇ as of such date of determination to

(2) EBITDA for the period of (i) the most recent four consecutive fiscal quarters ending at least 45 days prior to the date of determination or (ii) if quarterly information is available for the immediately preceding fiscal quarter and such financial information is included in the reports filed or delivered pursuant to

Section 4.02, the most recent four consecutive fiscal quarters, with such proforma and other adjustments to each of Indebtedness and EBITDA as are appropriate and consistent with the proforma and other adjustment provisions set forth in the definition of Consolidated Leverage Ratio.

“Consolidated Total Assets” means, as of any date of determination, the total assets shown on the consolidated balance sheet of the Company and its Restricted Subsidiaries as of the most recent date for which such a balance sheet is available, determined on a consolidated basis in accordance with GAAP (and, in the case of any determination relating to any Incurrence of Indebtedness or any Investment, on a pro forma basis including any property or assets being acquired in connection therewith).

“Currency Agreement” means any foreign exchange contract, currency swap agreement or other similar agreement with respect to currency values.

“Default” means any event which is, or after notice or passage of time or both would be, an Event of Default.

“Disqualified Stock” means, with respect to any Person, any Capital Stock which by its terms (or by the terms of any security into which it is convertible or for which it is exchangeable at the option of the holder) or upon the happening of any event:

(1) matures or is mandatorily redeemable (other than redeemable only for Capital Stock of such Person which is not itself Disqualified Stock) pursuant to a sinking fund obligation or otherwise;

(2) is convertible or exchangeable at the option of the holder for Indebtedness or Disqualified Stock; or

(3) is mandatorily redeemable or must be purchased upon the occurrence of certain events or otherwise, in whole or in part,

in each case on or prior to the first anniversary of the Stated Maturity of the Securities; provided, however, that any Capital Stock that would not constitute Disqualified Stock but for provisions thereof giving holders thereof the right to require such Person to purchase or redeem such Capital Stock upon the occurrence of an “asset sale” or “change of control” occurring prior to the first anniversary of the Stated Maturity of the Securities shall not constitute Disqualified Stock if (A) the “asset sale” or “change of control” provisions applicable to such Capital Stock are not more favorable to the holders of such Capital Stock than the terms applicable to the Securities in Sections 4.06 and 4.10 of this Indenture and (B) any such requirement only becomes operative after compliance with such terms applicable to the Securities, including the purchase of any Securities tendered pursuant thereto.

The amount of any Disqualified Stock that does not have a fixed redemption, repayment or repurchase price will be calculated in accordance with the terms of such Disqualified Stock as if such Disqualified Stock were redeemed, repaid or repurchased on any date on which the amount of such Disqualified Stock is to be

determined pursuant to the Indenture; provided, however, that if such Disqualified Stock could not be required to be redeemed, repaid or repurchased at the time of such determination, the redemption, repayment or repurchase price will be the book value of such Disqualified Stock as reflected in the most recent financial statements of such Person.

“Dollars” means the legal currency of the United States.

“EBITDA” for any period means the sum of Consolidated Net Income, plus the following to the extent deducted in calculating such Consolidated Net Income:

(1) all expense for income tax or asset tax of the Company and its consolidated Restricted Subsidiaries;

(2) Consolidated Interest Expense;

(3) depreciation and amortization expense of the Company and its consolidated Restricted Subsidiaries (excluding amortization expense attributable to a prepaid operating activity item that was paid in cash in a prior period); and

(4) all other non-cash charges of the Company and its consolidated Restricted Subsidiaries (excluding any such non-cash charge to the extent that it represents an accrual of or reserve for cash expenditures in any future period),

in each case for such period. Notwithstanding the foregoing, the provision for taxes based on the income or profits of, and the depreciation and amortization and non-cash charges of, a Restricted Subsidiary shall be added to Consolidated Net Income to compute EBITDA only to the extent (and in the same proportion, including by reason of minority interests) that the net income or loss of such Restricted Subsidiary was included in calculating Consolidated Net Income and only if a corresponding amount would be permitted at the date of determination to be dividended to the Company by such Restricted Subsidiary without prior approval (that has not been obtained), pursuant to the terms of its charter and all agreements, instruments, judgments, decrees, orders, statutes, rules and governmental regulations applicable to such Restricted Subsidiary or its stockholders.

“Equity Offering” means any sale of Capital Stock (other than Disqualified Stock).

“Exchange Act” means the U.S. Securities Exchange Act of 1934, as amended.

“GAAP” means generally accepted accounting principles in Mexico as in effect on the Issue Date.

“Guarantee” means any obligation, contingent or otherwise, of any Person directly or indirectly guaranteeing any Indebtedness of any Person and any obligation, direct or indirect, contingent or otherwise, of such Person:

(1) to purchase or pay (or advance or supply funds for the purchase or payment of) such Indebtedness of such Person (whether arising by virtue of partnership arrangements, or by agreements to keep-well, to purchase assets, goods, securities or services, to take-or-pay or to maintain financial statement conditions or otherwise); or

(2) entered into for the purpose of assuring in any other manner the obligee of such Indebtedness of the payment thereof or to protect such obligee against loss in respect thereof (in whole or in part);

provided, however, that the term “Guarantee” shall not include endorsements for collection or deposit in the ordinary course of business. The term “Guarantee” used as a verb has a corresponding meaning.

“Guaranty Agreement” means a supplemental indenture, in a form satisfactory to the Trustee, pursuant to which a Subsidiary Guarantor guarantees the Company’s obligations with respect to the Securities on the terms provided for in this Indenture.

“Hedging Obligations” of any Person means the obligations of such Person pursuant to any Interest Rate Agreement or Currency Agreement.

“Holder” or “Securityholder” means the Person in whose name a Security is registered on the Registrar’s books.

“Incur” means issue, assume, Guarantee, incur or otherwise become liable for; provided, however, that any Indebtedness of a Person existing at the time such Person becomes a Restricted Subsidiary (whether by merger, consolidation, acquisition or otherwise) shall be deemed to be Incurred by such Person at the time it becomes a Restricted Subsidiary. The term “Incurrence” when used as a noun shall have a correlative meaning.

Solely for purposes of determining compliance with Section 4.03:

(1) amortization of debt discount or the accretion of principal with respect to a non-interest bearing or other discount security;

(2) the payment of regularly scheduled interest in the form of additional Indebtedness of the same instrument or the payment of regularly scheduled dividends on Capital Stock in the form of additional Capital Stock of the same class and with the same terms; and

(3) the obligation to pay a premium in respect of Indebtedness arising in connection with the issuance of a notice of redemption or the making of a mandatory offer to purchase such Indebtedness,

will not be deemed to be the Incurrence of Indebtedness.

“Indebtedness” means, with respect to any Person on any date of determination (without duplication):

(1) the principal in respect of (A) indebtedness of such Person for money borrowed and (B) indebtedness evidenced by notes, debentures, bonds or other similar instruments for the payment of which such Person is responsible or liable, including, in each case, any premium on such indebtedness to the extent such premium has become due and payable;

(2) all Capital Lease Obligations (other than the Avantel/Telmex IRU and replacements thereof) of such Person and all Attributable Debt in respect of Sale/Leaseback Transactions entered into by such Person;

(3) all obligations of such Person issued or assumed as the deferred purchase price of property, all conditional sale obligations of such Person and all obligations of such Person under any title retention agreement (but excluding trade accounts payable arising in the ordinary course of business);

(4) all obligations of such Person for the reimbursement of any obligor on any letter of credit, fianza, bankers’ acceptance or similar credit transaction (other than obligations with respect to letters of credit or fianzas securing obligations (other than obligations described in clauses (1) through (3) above) entered into in the ordinary course of business of such Person to the extent such letters of credit or fianzas are not drawn upon or, if and to the extent drawn upon, such drawing is reimbursed no later than the tenth Business Day following payment on the letter of credit or fianza);

(5) the amount of all obligations of such Person with respect to the redemption, repayment or other repurchase of any Capital Stock of such Person or, any Subsidiary of such Person or that are determined by the value of such Capital Stock, the principal amount of such Capital Stock to be determined in accordance with this Indenture;

(6) all obligations of the type referred to in clauses (1) through (5) of other Persons and all dividends of other Persons for the payment of which, in either case, such Person is responsible or liable, directly or indirectly, as obligor, guarantor or otherwise, including by means of any Guarantee;

(7) all obligations of the type referred to in clauses (1) through (6) of other Persons secured by any Lien on any property or asset of such Person (whether or not such obligation is assumed by such Person), the amount of such obligation being deemed to be the lesser of the value of such property or assets and the amount of the obligation so secured; and

(8) to the extent not otherwise included in this definition, Hedging Obligations of such Person.

Notwithstanding the foregoing, in connection with the purchase by the Company or any Restricted Subsidiary of any business, the term “Indebtedness” will exclude post-closing payment adjustments to which the seller may become entitled to the extent such payment is determined by a final closing balance sheet or such payment depends on the performance of such business after the closing; provided, however, that, at the time of closing, the amount of any such payment is not determinable and, to the extent such payment thereafter becomes fixed and determined, the amount is paid within 30 days thereafter.

The amount of Indebtedness of any Person at any date shall be the outstanding balance at such date of all obligations as described above; provided, however, that in the case of Indebtedness sold at a discount, the amount of such Indebtedness at any time will be the accreted value thereof at such time.

“Indenture” means this Indenture as amended or supplemented from time to time.

“Independent Qualified Party” means an investment banking firm, accounting firm or appraisal firm of national standing; provided, however, that such firm is not an Affiliate of the Company.

“Interest Rate Agreement” means any interest rate swap agreement, interest rate cap agreement or other financial agreement or arrangement with respect to exposure to interest rates.

“Investment” in any Person means any direct or indirect advance, loan (other than advances to customers in the ordinary course of business that are recorded as accounts receivable on the balance sheet of the lender) or other extensions of credit (including by way of Guarantee or similar arrangement) or capital contribution to (by means of any transfer of cash or other property to others or any payment for property or services for the account or use of others), or any purchase or acquisition of Capital Stock, Indebtedness or other similar instruments issued by such Person. Except as otherwise provided for herein, the amount of an Investment shall be its fair value at the time the Investment is made and without giving effect to subsequent changes in value.

For purposes of the definition of “Unrestricted Subsidiary”, the definition of “Restricted Payment” and Section 4.04, “Investment” shall include

(1) the portion (proportionate to the Company’s equity interest in such Subsidiary) of the fair market value of the net assets of any Subsidiary of the Company at the time that such Subsidiary is designated an Unrestricted Subsidiary; provided, however, that upon a redesignation of such Subsidiary as a Restricted Subsidiary, the Company shall be deemed to continue to have a

permanent “Investment” in an Unrestricted Subsidiary equal to an amount (if positive) equal to (A) the Company’s “Investment” in such Subsidiary at the time of such redesignation less (B) the portion (proportionate to the Company’s equity interest in such Subsidiary) of the fair market value of the net assets of such Subsidiary at the time of such redesignation; and

(2) any property transferred to or from an Unrestricted Subsidiary shall be valued at its fair market value at the time of such transfer, in each case as determined in good faith by the Board of Directors.

“Issue Date” means February 2, 2007.

“Legal Holiday” means a Saturday, a Sunday or a day on which banking institutions are not required to be open in the State of New York or the United Mexican States.

“Lien” means any mortgage, pledge, security interest, encumbrance, lien or charge of any kind (including any conditional sale or other title retention agreement or lease in the nature thereof).

“Mexico” means the United Mexican States.

“Moody’s” means ▇▇▇▇▇’▇ Investors Service, Inc. and any successor to its rating agency business.

“Net Available Cash” from an Asset Disposition means cash payments received therefrom (including any cash payments received by way of deferred payment of principal pursuant to a note or installment receivable or otherwise and proceeds from the sale or other disposition of any securities received as consideration, but only as and when received, but excluding any other consideration received in the form of assumption by the acquiring Person of Indebtedness or other obligations relating to such properties or assets or received in any other non-cash form), in each case net of:

(1) all legal, title and recording tax expenses, commissions and other fees and expenses incurred, and all Federal, state, provincial, foreign and local taxes required to be accrued as a liability under GAAP, as a consequence of such Asset Disposition;

(2) all payments made on any Indebtedness which is secured by any assets subject to such Asset Disposition, in accordance with the terms of any Lien upon or other security agreement of any kind with respect to such assets, or which must by its terms, or in order to obtain a necessary consent to such Asset Disposition, or by applicable law, be repaid out of the proceeds from such Asset Disposition;

(3) all distributions and other payments required to be made to minority interest holders in Restricted Subsidiaries as a result of such Asset Disposition;

(4) the deduction of appropriate amounts provided by the seller as a reserve, in accordance with GAAP, against any liabilities associated with the property or other assets disposed in such Asset Disposition and retained by the Company or any Restricted Subsidiary after such Asset Disposition; and

(5) any portion of the purchase price from an Asset Disposition placed in escrow, whether as a reserve for adjustment of the purchase price, for satisfaction of indemnities in respect of such Asset Disposition or otherwise in connection with that Asset Disposition; provided, however, that upon termination of that escrow, Net Available Cash will be increased by any portion of funds in the escrow that are released to the Company or any Restricted Subsidiary.

“Net Cash Proceeds”, with respect to any issuance or sale of Capital Stock or Indebtedness, means the cash proceeds of such issuance or sale net of attorneys’ fees, accountants’ fees, underwriters’ or placement agents’ fees, discounts or commissions and brokerage, consultant and other fees actually incurred in connection with such issuance or sale and net of taxes paid or payable as a result thereof.

“Obligations” means with respect to any Indebtedness, all obligations for principal, premium, interest, penalties, fees, indemnifications, reimbursements, and other amounts payable pursuant to the documentation governing such Indebtedness.

“Officer” means the Chairman of the Board, the Chief Executive Officer, any Vice President, the Chief Financial Officer or the Secretary of the Company.

“Officers’ Certificate” means a certificate signed by two Officers.

“Opinion of Counsel” means a written opinion from legal counsel who is acceptable to the Trustee. The counsel may be an employee of or counsel to the Company or the Trustee.

“Permitted Asset Swap” means the disposition by the Company or its Restricted Subsidiaries of Telecommunication Assets to another Person or Persons in exchange for which the Company and the Restricted Subsidiaries receive Telecommunications Assets having, in the reasonable judgment of the disinterested members of the Board of Directors, a fair market value substantially equivalent to or greater than the fair market value of the Telecommunications Assets so disposed; provided, however, that if the book value of the Telecommunications Assets to be disposed in a Permitted Asset Swap (or in a series of related Permitted Asset Swaps) exceeds US$15 million, such disposition shall not constitute a Permitted Asset Swap unless an Independent Qualified Party shall have determined in writing that the fair market value of the Telecommunications Assets to be received by the Company and its Restricted Subsidiaries is substantially equivalent to or greater than the fair market value of the Telecommunications Assets to be disposed.

“Permitted Holders” means (a) any Person that is an Affiliate of the Company as of the Issue Date (and not established as an Affiliate in order to effect what would otherwise be a Change of Control) and (b) each of the shareholders of record of the Company as of the Issue Date identified on Exhibit A of this Indenture, and any Affiliate thereof.

“Permitted Investment” means an Investment by the Company or any Restricted Subsidiary in:

(1) the Company, a Restricted Subsidiary or a Person that will, upon the making of such Investment, become a Restricted Subsidiary; provided, however, that the primary business of such Restricted Subsidiary is a Related Business;

(2) another Person if, as a result of such Investment, such other Person is merged or consolidated with or into, or transfers or conveys all or substantially all its assets to, the Company or a Restricted Subsidiary; provided, however, that such Person’s primary business is a Related Business;

(3) cash and Temporary Cash Investments;

(4) receivables owing to the Company or any Restricted Subsidiary if created or acquired in the ordinary course of business and payable or dischargeable in accordance with customary trade terms; provided, however, that such trade terms may include such concessionary trade terms as the Company or any such Restricted Subsidiary deems reasonable under the circumstances;

(5) payroll, travel and similar advances to cover matters that are expected at the time of such advances ultimately to be treated as expenses for accounting purposes and that are made in the ordinary course of business;

(6) loans or advances to employees made in the ordinary course of business consistent with past practices of the Company or such Restricted Subsidiary;

(7) stock, obligations or securities received in settlement of debts created in the ordinary course of business and owing to the Company or any Restricted Subsidiary or in satisfaction of judgments;

(8) any Person to the extent such Investment represents the non-cash portion of the consideration received for (A) an Asset Disposition as permitted pursuant to Section 4.06 or (B) a disposition of assets not constituting an Asset Disposition;

(9) any Person where such Investment was acquired by the Company or any of its Restricted Subsidiaries (A) in exchange for any other Investment or

accounts receivable held by the Company or any such Restricted Subsidiary in connection with or as a result of a bankruptcy, workout, reorganization or recapitalization of the issuer of such other Investment or accounts receivable or (B) as a result of a foreclosure by the Company or any of its Restricted Subsidiaries with respect to any secured Investment or other transfer of title with respect to any secured Investment in default;

(10) any Person to the extent such Investments consist of prepaid expenses, negotiable instruments held for collection and lease, utility and workers’ compensation, performance and other similar deposits made in the ordinary course of business by the Company or any Restricted Subsidiary;

(11) any Person to the extent such Investments consist of Hedging Obligations otherwise permitted under Section 4.03;

(12) any Person to the extent such Investment exists on the Issue Date, and any extension, modification or renewal of any such Investments existing on the Issue Date, but only to the extent not involving additional advances, contributions or other Investments of cash or other assets or other increases thereof (other than as a result of the accrual or accretion of interest or original issue discount or the issuance of pay-in-kind securities), in each case, pursuant to the terms of such Investment as in effect on the Issue Date; and

(13) Persons to the extent such Investments, when taken together with all other Investments made pursuant to this clause (13) outstanding on the date such Investment is made, do not exceed US$10 million.

“Permitted Liens” means, with respect to any Person:

(1) pledges or deposits by such Person under workers’ compensation laws, unemployment insurance laws or similar legislation, or good faith deposits in connection with bids, tenders, contracts (other than for the payment of Indebtedness) or leases to which such Person is a party, or deposits to secure public or statutory obligations of such Person or deposits of cash or United States government bonds to secure surety or appeal bonds to which such Person is a party, or deposits as security for contested taxes or import duties or for the payment of rent, in each case Incurred in the ordinary course of business;

(2) Liens imposed by law, such as carriers’, warehousemen’s and mechanics’ Liens, in each case for sums not yet due or being contested in good faith by appropriate proceedings or other Liens arising out of judgments or awards against such Person with respect to which such Person shall then be proceeding with an appeal or other proceedings for review and Liens arising solely by virtue of any statutory or common law provision relating to banker’s Liens, rights of set-off or similar rights and remedies as to deposit accounts or other funds maintained with a creditor depository institution; provided, however, that (A) such deposit account is not a dedicated cash collateral account and is not subject to restrictions

against access by the Company in excess of those set forth by regulations promulgated by the Federal Reserve Board and (B) such deposit account is not intended by the Company or any Restricted Subsidiary to provide collateral to the depository institution;

(3) Liens for property taxes not yet subject to penalties for non-payment or which are being contested in good faith by appropriate proceedings;

(4) Liens in favor of issuers of surety bonds or letters of credit issued pursuant to the request of and for the account of such Person in the ordinary course of its business; provided, however, that such letters of credit do not constitute Indebtedness;

(5) minor survey exceptions, minor encumbrances, easements or reservations of, or rights of others for, licenses, rights-of-way, sewers, electric lines, telegraph and telephone lines and other similar purposes, or zoning or other restrictions as to the use of real property or Liens incidental to the conduct of the business of such Person or to the ownership of its properties which were not Incurred in connection with Indebtedness and which do not in the aggregate materially adversely affect the value of said properties or materially impair their use in the operation of the business of such Person;

(6) Liens securing Indebtedness Incurred to finance the construction, purchase or lease of, or repairs, improvements or additions to, property, plant or equipment of such Person; provided, however, that the Lien may not extend to any other property owned by such Person or any of its Restricted Subsidiaries at the time the Lien is Incurred (other than assets and property affixed or appurtenant thereto), and the Indebtedness (other than any interest thereon) secured by the Lien may not be Incurred more than 180 days after the later of the acquisition, completion of construction, repair, improvement, addition or commencement of full operation of the property subject to the Lien;

(7) Liens existing on the Issue Date;

(8) Liens on property or shares of Capital Stock of another Person at the time such other Person becomes a Subsidiary of such Person; provided, however, that the Liens may not extend to any other property owned by such Person or any of its Restricted Subsidiaries (other than assets and property affixed or appurtenant thereto);

(9) Liens on property at the time such Person or any of its Subsidiaries acquires the property, including any acquisition by means of a merger or consolidation with or into such Person or a Subsidiary of such Person; provided, however, that the Liens may not extend to any other property owned by such Person or any of its Restricted Subsidiaries (other than assets and property affixed or appurtenant thereto);

(10) Liens securing Indebtedness or other obligations of a Subsidiary of such Person owing to such Person or a Wholly Owned Subsidiary of such Person;

(11) Liens securing Hedging Obligations permitted to be Incurred under this Indenture;

(12) Liens securing directly or indirectly obligations in respect of term loans or revolving loans or other Indebtedness (including principal, premium, interest, penalties, fees, indemnifications, reimbursements and other amounts relating thereto) permitted to be Incurred under this Indenture; provided, however, that, at the time of the Incurrence of the Indebtedness so secured and after giving effect thereto, the Consolidated Secured Leverage Ratio would be no greater than 2 to 1;

(13) Liens to secure any Refinancing (or successive Refinancings) as a whole, or in part, of any Indebtedness secured by any Lien referred to in the foregoing clauses (6), (7), (8), (9) and clause (14) below; provided, however, that (A) such new Lien shall be limited to all or part of the same property and assets that secured or, under the written agreements pursuant to which the original Lien arose, could secure the original Lien (plus improvements and accessions to such property or proceeds or distributions thereof) and (B) the Indebtedness secured by such Lien at such time is not increased to any amount greater than the sum of (i) the outstanding principal amount or, if greater, committed amount of the Indebtedness described under clauses (6), (7), (8), (9) or (14) at the time the original Lien became a Permitted Lien and (ii) an amount necessary to pay any fees and expenses, including premiums, related to such refinancing, refunding, extension, renewal or replacement;

(14) Liens securing Purchase Money Obligations or Capital Lease Obligations Incurred in compliance with Section 4.03;

(15) Liens granted by the Company or any Restricted Subsidiary to the Company or any Restricted Subsidiary pursuant to any joint venture agreements;

(16) Liens in favor of customs and revenues authorities arising as a matter of law to secure customs payments in connection with the importation of goods;

(17) licenses of patents, trademarks, and other intellectual property rights granted by the Company or any Restricted Subsidiary in the ordinary course of business and not interfering in any material respect with the ordinary conduct of the Company or any Restricted Subsidiary;

(18) Pledges or deposits of cash and cash equivalents securing deductibles, self-insurance, co-payment, co-insurance, retentions or similar

obligations to providers of property, casualty or liability insurance in the ordinary course of business;

(19) Liens on insurance policies and the proceeds thereof securing the financing of the premiums with respect thereto; and

(20) licenses, leases, or subleases granted to third Persons or the Company or its Subsidiaries by the Company and/or its Subsidiaries in the ordinary course of business and not interfering in any material respect with the business of the Company and its Restricted Subsidiaries.

Notwithstanding the foregoing, “Permitted Liens” will not include any Lien described in clauses (6), (8), (9) or (14) above to the extent such Lien applies to any Additional Assets acquired directly or indirectly from Net Available Cash pursuant to Section 4.06. For purposes of this definition, the term “Indebtedness” shall be deemed to include interest on such Indebtedness.

“Person” means any individual, corporation, partnership, limited liability company, joint venture, association, joint-stock company, trust, unincorporated organization, government or any agency or political subdivision thereof or any other entity.

“Pesos” means the legal currency of the United Mexican States.

“Preferred Stock”, as applied to the Capital Stock of any Person, means Capital Stock of any class or classes (however designated) which is preferred as to the payment of dividends or distributions, or as to the distribution of assets upon any voluntary or involuntary liquidation or dissolution of such Person, over shares of Capital Stock of any other class of such Person.

“principal” of a Security means the principal of the Security plus the premium, if any, payable on the Security which is due or overdue or is to become due at the relevant time.

“Purchase Money Obligations” means any Indebtedness Incurred to finance or refinance the acquisition, leasing, construction or improvement of property (real or personal) or assets, and whether acquired through the direct acquisition of such property or assets or the Capital Stock of any Person owning such property or assets, or otherwise.

“Quotation Agent” means the Reference Treasury Dealer selected by the Trustee after consultation with the Company.

“Reference Treasury Dealer” means Credit Suisse Securities (USA) LLC and its successors and assigns and two other nationally recognized investment banking firms selected by the Company that are primary U.S. Government securities dealers.

“Reference Treasury Dealer Quotations” means, with respect to each Reference Treasury Dealer and any redemption date, the average, as calculated by the Trustee, of the bid and asked prices for the Comparable Treasury Issue, expressed in each case as a percentage of its principal amount, quoted in writing to the Trustee by such Reference Treasury Dealer at 5:00 p.m., New York City time, on the third Business Day immediately preceding such redemption date.

“Refinance” means, in respect of any Indebtedness, to refinance, extend, renew, refund, repay, prepay, purchase, redeem, defease or retire, or to issue other Indebtedness in exchange or replacement for, such Indebtedness. “Refinanced” and “Refinancing” shall have correlative meanings.

“Refinancing Indebtedness” means Indebtedness that Refinances any Indebtedness of the Company or any Restricted Subsidiary existing on the Issue Date or Incurred in compliance with this Indenture, including Indebtedness that Refinances Refinancing Indebtedness; provided, however, that:

(1) such Refinancing Indebtedness has a Stated Maturity no earlier than the Stated Maturity of the Indebtedness being Refinanced;

(2) such Refinancing Indebtedness has an Average Life at the time such Refinancing Indebtedness is Incurred that is equal to or greater than the Average Life of the Indebtedness being Refinanced;

(3) such Refinancing Indebtedness has an aggregate principal amount (or if Incurred with original issue discount, an aggregate issue price) that is equal to or less than the aggregate principal amount (or if Incurred with original issue discount, the aggregate accreted value) then outstanding or committed (plus fees and expenses, including any premium and defeasance costs) under the Indebtedness being Refinanced; and

(4) if the Indebtedness being Refinanced is subordinated in right of payment to the Securities, such Refinancing Indebtedness is subordinated in right of payment to the Securities at least to the same extent as the Indebtedness being Refinanced;

▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇, however, that Refinancing Indebtedness shall not include (A) Indebtedness of a Subsidiary that Refinances Indebtedness of the Company or (B) Indebtedness of the Company or a Restricted Subsidiary that Refinances Indebtedness of an Unrestricted Subsidiary.

“Related Business” means any business in which the Company or any of the Restricted Subsidiaries was engaged on the Issue Date and any business related, ancillary or complementary to such business.

“Restricted Payment” with respect to any Person means:

(1) the declaration or payment of any dividends or any other distributions of any sort in respect of its Capital Stock (including any payment in connection with any merger or consolidation involving such Person) or similar payment to the direct or indirect holders of its Capital Stock (other than (A) dividends or distributions payable solely in its Capital Stock (other than Disqualified Stock), (B) dividends or distributions payable solely to the Company or a Restricted Subsidiary and (C) prorata dividends or other distributions made by a Subsidiary that is not a Wholly Owned Subsidiary to minority stockholders (or owners of an equivalent interest in the case of a Subsidiary that is an entity other than a corporation));

(2) the purchase, redemption or other acquisition or retirement for value of any Capital Stock of the Company held by any Person (other than by a Restricted Subsidiary) or of any Capital Stock of a Restricted Subsidiary held by any Affiliate of the Company (other than by a Restricted Subsidiary), including in connection with any merger or consolidation and including the exercise of any option to exchange any Capital Stock (other than into Capital Stock of the Company that is not Disqualified Stock);

(3) the purchase, repurchase, redemption, defeasance or other acquisition or retirement for value, prior to scheduled maturity, scheduled repayment or scheduled sinking fund payment of any Subordinated Obligations of the Company or any Subsidiary Guarantor (other than (A) from the Company or a Restricted Subsidiary or (B) the purchase, repurchase, redemption, defeasance or other acquisition of Subordinated Obligations purchased in anticipation of satisfying a sinking fund obligation, principal installment or final maturity, in each case due within one year of the date of such purchase, repurchase, redemption, defeasance or other acquisition); or

(4) the making of any Investment (other than a Permitted Investment) in any Person.

“Restricted Subsidiary” means any Subsidiary of the Company that is not an Unrestricted Subsidiary.

“Sale/Leaseback Transaction” means an arrangement relating to property owned by the Company or a Restricted Subsidiary on the Issue Date or thereafter acquired by the Company or a Restricted Subsidiary whereby the Company or a Restricted Subsidiary transfers such property to a Person and the Company or a Restricted Subsidiary leases it from such Person.

“SEC” means the U.S. Securities and Exchange Commission.

“Securities” means the Securities issued under this Indenture.

“Securities Act” means the U.S. Securities Act of 1933, as amended.

“Senior Indebtedness” means with respect to any Person:

(1) Indebtedness of such Person, whether outstanding on the Issue Date or thereafter Incurred; and

(2) all other Obligations of such Person (including interest accruing on or after the filing of any petition in bankruptcy or for reorganization relating to such Person whether or not post-filing interest is allowed in such proceeding) in respect of Indebtedness described in clause (1) above,

unless, in the case of clauses (1) and (2), in the instrument creating or evidencing the same or pursuant to which the same is outstanding it is provided that such Indebtedness or other Obligations are subordinate in right of payment to the Securities or the Subsidiary Guaranty of such Person, as the case may be; provided, however, that Senior Indebtedness shall not include:

(A) any obligation of such Person to the Company or any Subsidiary;

(B) any liability for any national, state, local or other taxes owed or owing by such Person;

(C) any accounts payable or other liability to trade creditors arising in the ordinary course of business (including guarantees thereof or instruments evidencing such liabilities);

(D) any Indebtedness or other Obligation (and any accrued or unpaid interest in respect thereof) of such Person which is subordinate or junior in any respect to any other Indebtedness or other Obligation of such Person; or

(E) that portion of any Indebtedness which at the time of Incurrence is Incurred in violation of this Indenture.

“Significant Subsidiary” means any Restricted Subsidiary that would be a “Significant Subsidiary” of the Company within the meaning of Rule 1-02 under Regulation S-X promulgated by the SEC.

“Standard & Poor’s” means Standard & Poor’s, a division of The ▇▇▇▇▇▇-▇▇▇▇ Companies, Inc., and any successor to its rating agency business.

“Stated Maturity” means, with respect to any security, the date specified in such security as the fixed date on which the final payment of principal of such security is due and payable, including pursuant to any mandatory redemption provision (but excluding any provision providing for the repurchase of such security at the option of the holder thereof upon the happening of any contingency unless such contingency has occurred).

“Subordinated Obligation” means, with respect to a Person, any Indebtedness of such Person (whether outstanding on the Issue Date or thereafter Incurred) which is subordinate or junior in right of payment to the Securities or a Subsidiary Guaranty of such Person, as the case may be, pursuant to a written agreement to that effect.

“Subsidiary” means, with respect to any Person, any corporation, association, partnership or other business entity of which more than 50% of the total voting power of shares of Voting Stock is at the time owned or controlled, directly or indirectly, by (1) such Person, (2) such Person and one or more Subsidiaries of such Person or (3) one or more Subsidiaries of such Person.

“Subsidiary Guarantor” means Instalaciones y Contrataciones, S.A. de C.V., Servicios Axtel, S.A. de C.V., Impulsora e Inmobiliaria Regional, S.A. de C.V. and ▇▇▇▇▇▇▇, S. de ▇.▇. de C.V., Avantel Infraestructura S. de ▇.▇. de C.V., Adequip, S.A., Avantel Equipos, S.A. de C.V., Avantel Recursos, S.A. de C.V., Avantel Servicios, S.A. de C.V., Avantel Telecomunicaciones, S.A. de C.V., Telecom Networks, Inc. and each other Subsidiary of the Company that executes this Indenture as a guarantor on the Issue Date and each other Subsidiary of the Company that thereafter guarantees the Securities pursuant to the terms of this Indenture, in each case unless and until such Subsidiary is released from its obligation under its Subsidiary Guaranty pursuant to the terms of this Indenture.

“Subsidiary Guaranty” means a Guarantee by a Subsidiary Guarantor of the Company’s obligations with respect to the Securities.

“Telecommunications Assets” means any property, including licenses and applications, bids and agreements to acquire licenses, or other authority to provide telecommunications services, used or intended for use primarily in connection with a Related Business.

“Temporary Cash Investments” means any of the following:

(1) investments in securities issued or directly and fully guaranteed by the United States government or any agency or instrumentality thereof with a maturity of less than one year;

(2) investments in certificates of deposit and Eurodollar time deposits with a maturity of not later than six months, bankers’ acceptances with a maturity of not later than six months and overnight bank deposits, in each case with any U.S. commercial bank of recognized stature having capital and surplus in excess of US$500,000,000 and having a commercial paper rating (or the holding company thereof having a commercial paper rating) of “A-1” or better by Standard & Poor’s or “P-1” or better by ▇▇▇▇▇’▇, and that is a member of the Federal Reserve System;

(3) investments in commercial paper rated “A-1” or better by Standard & Poor’s or “P-1” or better by ▇▇▇▇▇’▇ with maturity of less than one year;

(4) investments in guaranteed investment contracts with a maturity of less than one year and entered into with (or fully guaranteed by) financial institutions whose long-term unsecured non-credit enhanced indebtedness is rated “A-” or better by Standard & Poor’s or “A2” or better by ▇▇▇▇▇’▇;

(5) investments in money market funds having a rating from each of Standard & Poor’s and ▇▇▇▇▇’▇ in the highest investment category granted thereby;

(6) investments in obligations with a maturity of less than one year that are direct obligations of the Mexican government or of entities having the statutory guarantee of the Mexican government, or obligations that are expressly and unconditionally guaranteed by the Mexican government;

(7) investments in obligations with a maturity of less than one year of Mexican commercial banks of recognized stature, supervised by the Mexican National Banking and Securities Commission, with a capital and surplus of at least US$250,000,000 (or its equivalent in other currencies); provided that the aggregate Investments of the Credit Parties in Mexican commercial banks not having Mexican domestic ratings of AA+(mex) or above from Fitch and mxA+ or above from Standard & Poor’s shall not exceed US$25,000,000 (or its equivalent in Pesos) at any time;

(8) investments in commercial paper of Mexican corporations with a maturity of less than one year and rated at least “A3” by Standard & Poor’s; and

(9) investments in repurchase agreements with a maturity of less than one year, in each case related to any of the Investments described in (6) through (8), and that are fully collateralized by such Investments, with any Mexican commercial bank that meets the criteria outlined in clause (7); provided that the aggregate amount invested in such repurchase agreements shall not exceed US$25,000,000 (or its equivalent in Pesos) at any time.

“Trustee” means the party named as such in this Indenture until a successor replaces it and, thereafter, means the successor.

“Trust Indenture Act or TIA” means the Trust Indenture Act of 1939 (15 U.S.C.§§ 77aaa-77bbbb) as in effect on the Issue Date.

“Trust Officer” means , when used with respect to the Trustee, any officer within the corporate trust department of the Trustee, including any vice president, assistant vice president, assistant treasurer, trust officer or any other officer of the Trustee who customarily performs functions similar to those performed by the Persons who at the

time shall be such officers, respectively, or to whom any corporate trust matter is referred because of such person’s knowledge of and familiarity with the particular subject and who shall have direct responsibility for the administration of this Indenture.

“Uniform Commercial Code” means the New York Uniform Commercial Code as in effect from time to time.

“Unrestricted Subsidiary” means:

(1) any Subsidiary of the Company that at the time of determination shall be designated an Unrestricted Subsidiary by the Board of Directors in the manner provided below; and

(2) any Subsidiary of an Unrestricted Subsidiary.

The Board of Directors may designate any Subsidiary of the Company (including any newly acquired or newly formed Subsidiary of the Company) to be an Unrestricted Subsidiary unless such Subsidiary or any of its Subsidiaries owns any Capital Stock or Indebtedness of, or owns or holds any Lien on any property of, the Company or any other Subsidiary of the Company that is not a Subsidiary of the Subsidiary to be so designated; provided, however, that either (A) the Subsidiary to be so designated has total assets of US$1,000 or less or (B) if such Subsidiary has assets greater than US$1,000, such designation would be permitted under Section 4.04.

The Board of Directors may designate any Unrestricted Subsidiary to be a Restricted Subsidiary; provided, however, that immediately after giving effect to such designation (A) the Company could Incur US$1.00 of additional Indebtedness under Section 4.03(a) and (B) no Default shall have occurred and be continuing. Any such designation by the Board of Directors shall be evidenced to the Trustee by promptly filing with the Trustee a copy of the resolution of the Board of Directors giving effect to such designation and an Officers’ Certificate certifying that such designation complied with the foregoing provisions.

“US Dollar Equivalent” means with respect to any monetary amount in a currency other than U.S. dollars, at any time for determination thereof, the amount of US dollars obtained by converting such foreign currency involved in such computation into US dollars at the spot rate for the purchase of US dollars with the applicable foreign currency as published in The Wall Street Journal in the “Exchange Rates” column under the heading “Currency Trading” on the date two Business Days prior to such determination.

Except as described in Section 4.03, whenever it is necessary to determine whether the Company has complied with any covenant in this Indenture or a Default has occurred and an amount is expressed in a currency other than US dollars, such amount will be treated as the US Dollar Equivalent determined as of the date such amount is initially determined in such currency.

“Voting Stock” of a Person means all classes of Capital Stock of such Person then outstanding and normally entitled (without regard to the occurrence of any contingency) to vote in the election of directors, managers or trustees thereof.

“Wholly Owned Subsidiary” means a Restricted Subsidiary all the Capital Stock of which (other than directors’ qualifying shares) is owned, directly or indirectly, by the Company or one or more other Wholly Owned Subsidiaries.

SECTION 1.02 Other Definitions.

Term	Defined in Section
“Additional Amounts”	4.14
“Affiliate Transaction”	4.07(a)
“Bankruptcy Law”	6.01
“Change of Control Offer”	4.10(b)
“covenant defeasance option”	8.01(b)
“Custodian”	6.01
“CT Corporation”	11.11
“Event of Default”	6.01
“Initial Lien”	4.11
“legal defeasance option”	8.01(b)
“Notice of Default”	6.01
“Offer”	4.06(b)
“Offer Amount”	4.06(c)(2)
“Offer Period”	4.06(c)(2)
“Paying Agent”	2.03
“Purchase Date”	4.06(c)(1)
“Registrar”	2.03
“Relevant Taxing Jurisdiction	4.14
“Successor Company”	5.01(a)(1)
“Taxes”	4.14

SECTION 1.03 Incorporation by Reference of Trust Indenture Act. This Indenture is subject to the mandatory provisions of the TIA that would be applicable if this Indenture were to be qualified under the TIA (other than TIA § 314(d)), which provisions are incorporated by reference in and made a part of this Indenture. The following TIA terms have the following meanings:

“Commission” means the SEC;

“indenture securities” means the Securities and the Subsidiary Guarantees;

“indenture security holder” means a Securityholder;

“indenture to be qualified” means this Indenture;

“indenture trustee” or “institutional trustee” means the Trustee; and

“obligor” on the indenture securities means the Company, each Subsidiary Guarantor and any other obligor on the indenture securities.

All other TIA terms used in this Indenture that are defined by the TIA, defined by TIA reference to another statute or defined by SEC rule have the meanings assigned to them by such definitions.

SECTION 1.04 Rules of Construction. Unless the context otherwise requires:

(1) a term has the meaning assigned to it;

(2) an accounting term not otherwise defined has the meaning assigned to it in accordance with GAAP;

(3) “or” is not exclusive;

(4) “including” means including without limitation;

(5) words in the singular include the plural and words in the plural include the singular;

(6) unsecured Indebtedness shall not be deemed to be subordinate or junior to secured Indebtedness merely by virtue of its nature as unsecured Indebtedness;

(7) secured Indebtedness shall not be deemed to be subordinate or junior to any other secured Indebtedness merely because it has a junior priority with respect to the same collateral;

(8) the principal amount of any noninterest bearing or other discount security at any date shall be the principal amount thereof that would be shown on a balance sheet of the issuer dated such date prepared in accordance with GAAP;

(9) the principal amount of any Preferred Stock shall be (A) the maximum liquidation value of such Preferred Stock or (B) the maximum mandatory redemption or mandatory repurchase price with respect to such Preferred Stock, whichever is greater; and

(10) all references to the date the Securities were originally issued shall refer to the Issue Date.

Article 2

The Securities

SECTION 2.01 Form and Dating. Provisions relating to the Securities are set forth in the Rule 144A/Regulation S/IAI Appendix attached hereto (the “Appendix”) which is hereby incorporated in, and expressly made part of, this Indenture. The Securities and the Trustee’s certificate of authentication shall be substantially in the form of Exhibit 1 to the Appendix which is hereby incorporated in, and expressly made a part of, this Indenture. The Securities may have notations, legends or endorsements required by law, stock exchange rule, agreements to which the Company is subject, if

any, or usage (provided that any such notation, legend or endorsement is in a form acceptable to the Company). Each Security shall be dated the date of its authentication. The terms of the Securities set forth in the Appendix are part of the terms of this Indenture.

SECTION 2.02 Execution and Authentication. Two Officers who are duly empowered for acts of administration (“actos de administración”) and to execute negotiable instruments (“títulos de crédito”) shall sign the Securities for the Company by manual or facsimile signature.

If an Officer whose signature is on a Security no longer holds that office at the time the Trustee authenticates the Security, the Security shall be valid nevertheless.

A Security shall not be valid until an authorized signatory of the Trustee manually signs the certificate of authentication on the Security. The signature shall be conclusive evidence that the Security has been authenticated under this Indenture.

On the Issue Date, the Trustee shall authenticate and deliver US$275,000,000 of 7⅝ % Senior Unsecured Notes Due 2017 and, at any time and from time to time thereafter, the Trustee shall authenticate and deliver Securities for original issue in an aggregate principal amount specified in such order, in each case upon a written order of the Company signed by two Officers or by an Officer and either an Assistant Treasurer or an Assistant Secretary of the Company. Such order shall specify the amount of the Securities to be authenticated and the date on which the original issue of Securities is to be authenticated and, in the case of an issuance of Additional Securities pursuant to Section 2.13 after the Issue Date, shall certify that such issuance is in compliance with Section 4.03.

The Trustee may appoint an authenticating agent reasonably acceptable to the Company to authenticate the Securities. Unless limited by the terms of such appointment, an authenticating agent may authenticate Securities whenever the Trustee may do so. Each reference in this Indenture to authentication by the Trustee includes authentication by such agent. An authenticating agent has the same rights as any Registrar, Paying Agent or agent for service of notices and demands.

SECTION 2.03 Registrar and Paying Agent. The Company shall maintain an office or agency where Securities may be presented for registration of transfer or for exchange (the “Registrar”) and an office or agency where Securities may be presented for payment (the “Paying Agent”). The Registrar shall keep a register of the Securities and of their transfer and exchange. The Company may have one or more co-registrars and one or more additional paying agents. The term “Paying Agent” includes any additional paying agent. The term “Registrar” includes any co-registrar.

The Company shall enter into an appropriate agency agreement with any Registrar, Paying Agent or co-registrar not a party to this Indenture, which shall incorporate the terms of the TIA. The agreement shall implement the provisions of this Indenture that relate to such agent. The Company shall notify the Trustee of the name

and address of any such agent. If the Company fails to maintain a Registrar or Paying Agent, the Trustee shall act as such and shall be entitled to appropriate compensation therefor pursuant to Section 7.07. The Company or any Wholly Owned Subsidiary incorporated or organized within The United States of America may act as Paying Agent, Registrar, co-registrar or transfer agent.

The Company initially appoints the Trustee as Registrar and Paying Agent in connection with the Securities.

SECTION 2.04 Paying Agent To Hold Money in Trust. Prior to each due date of the principal and interest on any Security, the Company shall deposit in Dollars with the Paying Agent a sum sufficient to pay such principal and interest when so becoming due. The Company shall require each Paying Agent (other than the Trustee) to agree in writing that the Paying Agent shall hold in trust for the benefit of Securityholders or the Trustee all money held by the Paying Agent for the payment of principal of or interest on the Securities and shall notify the Trustee of any default by the Company in making any such payment. If the Company or a Subsidiary acts as Paying Agent, it shall segregate the money held by it as Paying Agent and hold it as a separate trust fund. The Company at any time may require a Paying Agent to pay all money held by it to the Trustee and to account for any funds disbursed by the Paying Agent. Upon complying with this Section, the Paying Agent shall have no further liability for the money delivered to the Trustee.

SECTION 2.05 Securityholder Lists. The Trustee shall preserve in as current a form as is reasonably practicable the most recent list available to it of the names and addresses of Securityholders. If the Trustee is not the Registrar, the Company shall furnish to the Trustee, in writing at least five Business Days before each interest payment date and at such other times as the Trustee may request in writing, a list in such form and as of such date as the Trustee may reasonably require of the names and addresses of Securityholders.

SECTION 2.06 Transfer and Exchange. The Securities shall be issued in registered form and shall be transferable only upon the surrender of a Security for registration of transfer. When a Security is presented to the Registrar or a co-registrar with a request to register a transfer, the Registrar shall register the transfer as requested if the requirements of this Indenture and Section 8-401(1) of the Uniform Commercial Code are met. When Securities are presented to the Registrar or a co-registrar with a request to exchange them for an equal principal amount of Securities of other denominations, the Registrar shall make the exchange as requested if the same requirements are met.

SECTION 2.07 Replacement Securities. If a mutilated Security is surrendered to the Registrar or if the Holder of a Security claims that the Security has been lost, destroyed or wrongfully taken, the Company shall issue and the Trustee shall authenticate a replacement Security if the requirements of Section 8-405 of the Uniform Commercial Code are met and the Holder satisfies any other reasonable requirements of the Trustee. If required by the Trustee or the Company, such Holder shall furnish an

indemnity bond sufficient in the judgment of the Company and the Trustee to protect the Company, the Trustee, the Paying Agent, the Registrar and any co-registrar from any loss which any of them may suffer if a Security is replaced. The Company and the Trustee may charge the Holder for their expenses in replacing a Security.

Every replacement Security is an additional Obligation of the Company.

SECTION 2.08 Outstanding Securities. Securities outstanding at any time are all Securities authenticated by the Trustee except for those canceled by it, those delivered to it for cancellation and those described in this Section as not outstanding. A Security does not cease to be outstanding because the Company or an Affiliate of the Company holds the Security.

If a Security is replaced pursuant to Section 2.07, it ceases to be outstanding unless the Trustee and the Company receive proof satisfactory to them that the replaced Security is held by a bonafide purchaser.

If the Paying Agent segregates and holds in trust, in accordance with this Indenture, on a redemption date or maturity date money sufficient to pay all principal and interest payable on that date with respect to the Securities (or portions thereof) to be redeemed or maturing, as the case may be, then on and after that date such Securities (or portions thereof) cease to be outstanding and interest on them ceases to accrue.

SECTION 2.09 Temporary Securities. Until definitive Securities are ready for delivery, the Company may prepare and the Trustee shall authenticate temporary Securities. Temporary Securities shall be substantially in the form of definitive Securities but may have variations that the Company considers appropriate for temporary Securities. Without unreasonable delay, the Company shall prepare and the Trustee shall authenticate definitive Securities and deliver them in exchange for temporary Securities.

SECTION 2.10 Cancellation. The Company at any time may deliver Securities to the Trustee for cancellation. The Registrar and the Paying Agent shall forward to the Trustee any Securities surrendered to them for registration of transfer, exchange or payment. The Trustee and no one else shall cancel and dispose of (subject to the record retention requirements of the Exchange Act) all Securities surrendered for registration of transfer, exchange, payment or cancellation and deliver a certificate of such disposal to the Company unless the Company directs the Trustee to deliver canceled Securities to the Company. The Company may not issue new Securities to replace Securities it has redeemed, paid or delivered to the Trustee for cancellation.

SECTION 2.11 Defaulted Interest. If the Company defaults in a payment of interest on the Securities, the Company shall pay defaulted interest (plus interest on such defaulted interest to the extent lawful) in any lawful manner. The Company may pay the defaulted interest to the persons who are Securityholders on a subsequent special record date. The Company shall fix or cause to be fixed any such special record date and payment date and shall promptly mail to each Securityholder and

the Trustee a notice that states the special record date, the payment date and the amount of defaulted interest to be paid.

SECTION 2.12 CUSIP Numbers. The Company in issuing the Securities may use “CUSIP” numbers (if then generally in use) and, if so, the Trustee shall use “CUSIP” numbers in notices of redemption as a convenience to Holders; provided, however, that any such notice may state that no representation is made as to the correctness of such numbers either as printed on the Securities or as contained in any notice of a redemption and that reliance may be placed only on the other identification numbers printed on the Securities, and any such redemption shall not be affected by any defect in or omission of such numbers.

SECTION 2.13 Issuance of Additional Securities. The Company shall be entitled, subject to its compliance with Section 4.03, to issue Additional Securities under this Indenture which shall have identical terms as the Securities issued on the Issue Date, other than with respect to the date of issuance and issue price. The Initial Securities issued on the Issue Date and any Additional Securities issued in exchange therefor shall be treated as a single class for all purposes under this Indenture.

With respect to any Additional Securities, the Company shall set forth in a resolution of the Board of Directors and an Officers’ Certificate, a copy of each of which shall be delivered to the Trustee, the following information:

(1) the aggregate principal amount of such Additional Securities to be authenticated and delivered pursuant to this Indenture; and

(2) the issue price, the issue date and the CUSIP number of such Additional Securities; provided, however, that no Additional Securities may be issued at a price that would cause such Additional Securities to have “original issue discount” within the meaning of Section 1273 of the Code.

Article 3

Redemption

SECTION 3.01 Notices to Trustee. If the Company elects to redeem Securities pursuant to paragraph 5 or 6 of the Securities, it shall notify the Trustee in writing of the redemption date, the principal amount of Securities to be redeemed and the paragraph of the Securities pursuant to which the redemption will occur.

The Company shall give each notice to the Trustee provided for in this Section at least 35 but no more than 60 days before the redemption date unless the Trustee consents to a shorter period. Such notice shall be accompanied by an Officers’ Certificate and an Opinion of Counsel from the Company to the effect that such redemption will comply with the conditions herein.

SECTION 3.02 Selection of Securities to Be Redeemed. If fewer than all the Securities are to be redeemed, the Trustee shall select the Securities to be

redeemed pro rata or by lot or by a method that complies with applicable legal and securities exchange requirements, if any, and that the Trustee in its sole discretion shall deem to be fair and appropriate and in accordance with methods generally used at the time of selection by fiduciaries in similar circumstances. The Trustee shall make the selection from outstanding Securities not previously called for redemption. The Trustee may select for redemption portions of the principal of Securities that have denominations larger than US$2,000. Securities and portions of them the Trustee selects shall be in principal amounts of US$2,000 or a whole multiple of US$1,000, in excess of $2,000. Provisions of this Indenture that apply to Securities called for redemption also apply to portions of Securities called for redemption. The Trustee shall notify the Company promptly of the Securities or portions of Securities to be redeemed.

SECTION 3.03 Notice of Redemption. At least 30 days but not more than 60 days before a date for redemption of Securities, the Company shall mail a notice of redemption by first-class mail to each Holder of Securities to be redeemed at such ▇▇▇▇▇▇’s registered address.

The notice shall identify the Securities to be redeemed and shall state:

(1) the redemption date;

(2) the redemption price;

(3) the name and address of the Paying Agent;

(4) that Securities called for redemption must be surrendered to the Paying Agent to collect the redemption price;

(5) if fewer than all the outstanding Securities are to be redeemed, the identification and principal amounts of the particular Securities to be redeemed;

(6) that, unless the Company defaults in making such redemption payment, interest on Securities (or portion thereof) called for redemption ceases to accrue on and after the redemption date;

(7) the “CUSIP” number, ISIN or “Common Code” number, if any, printed on the Securities being redeemed; and

(8) that no representation is made as to the correctness or accuracy of the CUSIP number, if any, listed in such notice or printed on the Securities.

At the Company’s request upon reasonable prior notice, the Trustee shall give the notice of redemption in the Company’s name and at the Company’s expense. In such event, the Company shall provide the Trustee with the information required by this Section.

SECTION 3.04 Effect of Notice of Redemption. Once notice of redemption is mailed, Securities called for redemption become due and payable on the

redemption date and at the redemption price stated in the notice. Upon surrender to the Paying Agent, such Securities shall be paid at the redemption price stated in the notice, plus accrued interest to the redemption date (subject to the right of Holders of record on the relevant record date to receive interest due on the related interest payment date). Failure to give notice or any defect in the notice to any Holder shall not affect the validity of the notice to any other Holder.

SECTION 3.05 Deposit of Redemption Price. Prior to the redemption date, the Company shall deposit with the Paying Agent (or, if the Company or a Subsidiary is the Paying Agent, shall segregate and hold in trust) money sufficient to pay the redemption price of and accrued interest on all Securities to be redeemed on that date other than Securities or portions of Securities called for redemption which have been delivered by the Company to the Trustee for cancellation.

SECTION 3.06 Securities Redeemed in Part. Upon surrender of a Security that is redeemed in part, the Company shall execute and the Trustee shall authenticate for the Holder (at the Company’s expense) a new Security equal in principal amount to the unredeemed portion of the Security surrendered.

Article 4

Covenants

SECTION 4.01 Payment of Securities. The Company shall promptly pay the principal of and interest on the Securities in Dollars on the dates and in the manner provided in the Securities and in this Indenture. Principal and interest shall be considered paid on the date due if on such date the Trustee or the Paying Agent holds in accordance with this Indenture money sufficient to pay all principal and interest then due.

The Company shall pay interest on overdue principal at the rate specified therefor in the Securities, and it shall pay interest on overdue installments of interest at the same rate to the extent lawful.

SECTION 4.02 Reports to Holders. (a) The Company shall provide to the Trustee and each Holder and make available to securities analysts and prospective investors the following information:

(1) an English language translation of each report that the Company or any Restricted Subsidiary files with or provides to, or is required to file with or provide to, the Bolsa Mexicana de Valores or any other securities exchange on which securities of the Company or any Restricted Subsidiary are listed promptly after such report is so filed or provided, which report shall be prepared in all material respects in accordance with all the rules and regulations applicable to such report and shall be filed or provided within the time periods required of such report; and

(2) to the extent not included in the information required by clause (1) above:

(A) an English language version of the Company’s annual audited consolidated financial statements, prepared in accordance with GAAP, promptly upon such financial statements becoming available but not later than 180 days after the end of the Company’s relevant fiscal year, together with a “Management’s Discussion and Analysis of Financial Condition and Results of Operations” that includes at minimum (i) a discussion of the causes of material changes from year to year in line items in the Company’s consolidated statement of operations, (ii) a description of the Company’s material sources and uses of liquidity, (iii) a discussion of any material trends affecting the business, (iv) a discussion of any off-balance sheet arrangements and (v) a tabular disclosure of contractual obligations;

(B) an English language version of the Company’s unaudited quarterly consolidated financial statements, prepared in accordance with GAAP, promptly upon such financial statements becoming available but not later than 60 days after the end of the Company’s relevant fiscal quarter, together with a “Management’s Discussion and Analysis of Financial Condition and Results of Operations” that includes at minimum (i) a discussion of the causes of material changes in the current fiscal year to date from the same period in the prior fiscal year in line items in the Company’s consolidated statement of operations, (ii) a description of the Company’s material sources and uses of liquidity, (iii) a discussion of any material trends affecting the business and (iv) a discussion of any off-balance sheet arrangements;

(C) at any time that any of the Company’s Subsidiaries are not Subsidiary Guarantors, then the financial statements described in clauses (A) and (B) will include, in a footnote, condensed consolidating financial information for the same periods with a separate column for: (i) the Company, (ii) the Subsidiary Guarantors on a combined basis, (iii) all Subsidiaries that are not Subsidiary Guarantors on a combined basis, (iv) consolidating adjustments and (v) the total consolidated amounts; provided, however, that at least one of the total assets, revenues, income from continuing operations before income taxes, and cash flow from operating activities of the Subsidiaries that are not Subsidiary Guarantors on a combined basis is at least 3% of the corresponding amount for the Company and its Subsidiaries on a consolidated basis;

(D) at any time that any of the Company’s Subsidiaries are Unrestricted Subsidiaries, the financial statements described in clauses (A) and (B) will be accompanied by internally prepared reconciliations or adjustments to the financial information of the Company and its Subsidiaries sufficient to demonstrate compliance with the covenants set forth in the Indenture;

(E) a brief description of any transaction or series of similar transactions to which the Company or any of its Subsidiaries is a party and in which any of the following persons has or will have a direct or indirect material interest: (1) any director or officer of the Company, (2) any nominee for election as a director, (3) any Affiliate of the Company, and (4) any member of the immediate family of any of the foregoing; and

(F) so long as the Securities are not freely transferable under the Securities Act, any information required to be delivered pursuant to Rule 144A(d)(4) under the Securities Act.

(b) The Company will be deemed to have provided such information to Holders, securities analysts and prospective investors by (x) including such information in documents filed with or furnished to the SEC for public availability or (y) posting reports including such information on its website, each within the time periods specified above.

SECTION 4.03 Limitation on Indebtedness. (a) The Company shall not, and shall not permit any Restricted Subsidiary to, Incur, directly or indirectly, any Indebtedness; provided, however, that the Company and the Subsidiary Guarantors shall be entitled to Incur Indebtedness if, on the date of such Incurrence and after giving effect thereto on a proforma basis, the Consolidated Leverage Ratio would be less than 4.0 to 1.

(a) Notwithstanding the foregoing paragraph (a), the Company and the Restricted Subsidiaries shall be entitled to Incur any or all of the following Indebtedness:

(1) Indebtedness owed to and held by the Company or a Wholly Owned Subsidiary; provided, however, that (A) any subsequent issuance or transfer of any Capital Stock which results in any such Wholly Owned Subsidiary ceasing to be a Wholly Owned Subsidiary or any subsequent transfer of such Indebtedness (other than to the Company or a Wholly Owned Subsidiary) shall be deemed, in each case, to constitute the Incurrence of such Indebtedness by the obligor thereon, (B) if the Company is the obligor on such Indebtedness, such Indebtedness is expressly subordinated to the prior payment in full in cash of all obligations with respect to the Securities, and (C) if a Subsidiary Guarantor is the obligor on such Indebtedness, such Indebtedness is expressly subordinated to the prior payment in full in cash of all obligations of such obligor with respect to its Subsidiary Guaranty;

(2) the Securities (other than any Additional Securities);

(3) Indebtedness outstanding on the Issue Date (other than Indebtedness described in clause (1) or (2) of this Section 4.03(b));

(4) Refinancing Indebtedness in respect of Indebtedness Incurred pursuant to Section 4.03(a) or pursuant to clause (2) or (3) of this Section 4.03(b) or this clause (4);

(5) Hedging Obligations consisting of (x) Interest Rate Agreements directly related to Indebtedness permitted to be Incurred by the Company and the Restricted Subsidiaries pursuant to this Indenture; or (y) Hedging Obligations relating to Currency Agreements provided such Currency Agreements are entered into for bona fide hedging purposes of the Company or any Restricted Subsidiary and not for the purpose of speculation;

(6) Obligations in respect of performance, bid and surety bonds and completion guarantees provided by the Company or any Restricted Subsidiary in the ordinary course of business, including guarantees or obligations of the Company or any Restricted Subsidiary with respect to letters of credit and/or fianzas supporting such bid, performance or surety obligations;

(7) Indebtedness arising from the honoring by a bank or other financial institution of a check, draft or similar instrument drawn against insufficient funds in the ordinary course of business; provided, however, that such Indebtedness is extinguished within two Business Days of its Incurrence;

(8) Purchase Money Obligations and Capital Lease Obligations, in an aggregate principal amount at any time outstanding not exceeding an amount equal to 10% of the Consolidated Total Assets at any time outstanding;

(9) Indebtedness consisting of the Subsidiary Guaranty of a Subsidiary Guarantor and any Guarantee by a Subsidiary Guarantor of Indebtedness Incurred pursuant to paragraph (a) of this Section 4.03 or pursuant to clause (1), (2), (3) above or pursuant to clause (4) above to the extent the Refinancing Indebtedness Incurred thereunder directly or indirectly Refinances Indebtedness Incurred pursuant to paragraph (a) or pursuant to clause (2) or (3);

(10) indemnification, adjustment of purchase price, earn-out or similar obligations, in each case, incurred or assumed in connection with the acquisition or disposition of any business or assets of the Company or any Restricted Subsidiary or Capital Stock of a Restricted Subsidiary, other than guarantees of Indebtedness incurred by any Person acquiring all or any portion of such business, assets or Equity Interests for the purposes of financing or in contemplation of any such acquisition; provided that (a) any amount of such obligations included on the face of the balance sheet of the Company or any Restricted Subsidiary shall not be permitted under this clause (10) and (b) in the case of a disposition, the maximum aggregate liability in respect of all such obligations outstanding under this clause

(10) shall at no time exceed the gross proceeds actually received by the Issuer and the Restricted Subsidiaries in connection with such disposition; and

(11) Indebtedness of the Company or any of its Restricted Subsidiaries in an aggregate principal amount which, when taken together with all other Indebtedness of the Company and its Restricted Subsidiaries outstanding on the date of such Incurrence (other than Indebtedness permitted by clauses (1) through (10) of this Section 4.03(b) or Section 4.03(a)), does not exceed US$30 million.

(b) Notwithstanding the foregoing, neither the Company nor any Subsidiary Guarantor shall Incur any Indebtedness pursuant to Section 4.03(b) if the proceeds thereof are used, directly or indirectly, to Refinance any Subordinated Obligations of the Company or any Subsidiary Guarantor unless such Indebtedness shall be subordinated to the Securities or to the applicable Subsidiary Guaranty to at least the same extent as such Subordinated Obligations.

(c) For purposes of determining compliance with this Section 4.03, (1) in the event that an item of Indebtedness (or any portion thereof) meets the criteria of more than one of the types of Indebtedness described herein, the Company, in its sole discretion, shall classify such item of Indebtedness (or any portion thereof) at the time of Incurrence and shall only be required to include the amount and type of such Indebtedness in one of the above clauses and (2) the Company shall be entitled to divide and classify an item of Indebtedness in more than one of the types of Indebtedness described herein.

(d) For purposes of determining compliance with any US dollar denominated restriction on the Incurrence of Indebtedness where the Indebtedness Incurred is denominated in a different currency, the amount of such Indebtedness shall be the US Dollar Equivalent determined on the date of the Incurrence of such Indebtedness; provided, however, that if any such Indebtedness denominated in a different currency is subject to a Currency Agreement with respect to US dollars covering all principal, premium, if any, and interest payable on such Indebtedness, the amount of such Indebtedness expressed in US dollars shall be as provided in such Currency Agreement. The principal amount of any Refinancing Indebtedness Incurred in the same currency as the Indebtedness being Refinanced shall be the US Dollar Equivalent of the Indebtedness Refinanced, except to the extent that (1) such US Dollar Equivalent was determined based on a Currency Agreement, in which case the Refinancing Indebtedness shall be determined in accordance with the preceding sentence, and (2) the principal amount of the Refinancing Indebtedness exceeds the principal amount of the Indebtedness being Refinanced, in which case the US Dollar Equivalent of such excess shall be determined on the date such Refinancing Indebtedness is Incurred.

SECTION 4.04 Limitation on Restricted Payments. (a) The Company shall not, and shall not permit any Restricted Subsidiary, directly or indirectly, to make a Restricted Payment if at the time the Company or such Restricted Subsidiary makes such Restricted Payment:

(1) a Default shall have occurred and be continuing (or would result therefrom);

(2) the Company is not entitled to Incur an additional US$1.00 of Indebtedness under Section 4.03(a); or

(3) the aggregate amount of such Restricted Payment and all other Restricted Payments since the Issue Date (other than Restricted Payments made pursuant to clause (1), (2), (4), (5), (6), (7) or (9) of Section 4.04(b)) would exceed the sum of (without duplication):

(A) 50% of the Adjusted Consolidated Net Income accrued during the period (treated as one accounting period) from January 1, 2007 to the end of the most recent fiscal quarter ending at least 45 days prior to the date of such Restricted Payment (or, in case such Adjusted Consolidated Net Income shall be a deficit, minus 100% of such deficit); plus

(B) 100% of the aggregate Net Cash Proceeds received by the Company from the issuance or sale of its Capital Stock (other than Disqualified Stock) subsequent to December 1, 2005 (other than an issuance or sale to a Subsidiary of the Company and other than an issuance or sale to an employee stock ownership plan or to a trust established by the Company or any of its Subsidiaries for the benefit of their employees) and 100% of any cash capital contribution received by the Company from its shareholders subsequent to December 1, 2005; plus

(C) the amount by which Indebtedness of the Company is reduced on the Company’s balance sheet upon the conversion or exchange (other than by a Subsidiary of the Company) subsequent to the Issue Date of any Indebtedness of the Company convertible or exchangeable for Capital Stock (other than Disqualified Stock) of the Company (less the amount of any cash, or the fair value of any other property, distributed by the Company upon such conversion or exchange); provided, however, that the foregoing amount shall not exceed the Net Cash Proceeds received by the Company or any Restricted Subsidiary from the sale of such Indebtedness (excluding Net Cash Proceeds from sales to a Subsidiary of the Company or to an employee stock ownership plan or to a trust established by the Company or any of its Subsidiaries for the benefit of their employees); plus

(D) an amount equal to the sum of (i) the net reduction in the Investments (other than Permitted Investments) made by the Company or any Restricted Subsidiary in any Person resulting from repurchases, repayments or redemptions of such Investments by such Person, proceeds

realized on the sale of such Investment and proceeds representing the return of capital (excluding dividends and distributions), in each case received by the Company or any Restricted Subsidiary, and (ii) to the extent such Person is an Unrestricted Subsidiary, the portion (proportionate to the Company’s equity interest in such Subsidiary) of the fair market value of the net assets of such Unrestricted Subsidiary at the time such Unrestricted Subsidiary is designated a Restricted Subsidiary; provided, however, that the foregoing sum shall not exceed, in the case of any such Person or Unrestricted Subsidiary, the amount of Investments (excluding Permitted Investments) previously made (and treated as a Restricted Payment) by the Company or any Restricted Subsidiary in such Person or Unrestricted Subsidiary.

(b) The provisions of Section 4.04(a) shall not prohibit:

(1) any Restricted Payment made out of the Net Cash Proceeds of the substantially concurrent sale of, or made by exchange for, Capital Stock of the Company (other than Disqualified Stock and other than Capital Stock issued or sold to a Subsidiary of the Company or an employee stock ownership plan or to a trust established by the Company or any of its Subsidiaries for the benefit of their employees) or a substantially concurrent cash capital contribution received by the Company from its shareholders; provided, however, that (A) such Restricted Payment shall be excluded in the calculation of the amount of Restricted Payments and (B) the Net Cash Proceeds from such sale or such cash capital contribution (to the extent so used for such Restricted Payment) shall be excluded from the calculation of amounts under Section 4.04(a)(3)(B);

(2) any purchase, repurchase, redemption, defeasance or other acquisition or retirement for value of Subordinated Obligations of the Company or a Subsidiary Guarantor made by exchange for, or out of the proceeds of the substantially concurrent sale of, Indebtedness of such Person which is permitted to be Incurred pursuant to Section 4.03; provided, however, that such purchase, repurchase, redemption, defeasance or other acquisition or retirement for value shall be excluded in the calculation of the amount of Restricted Payments;

(3) dividends paid within 60 days after the date of declaration thereof if at such date of declaration such dividend would have complied with this Section 4.04; provided, however, that at the time of payment of such dividend, no other Default shall have occurred and be continuing (or result therefrom); providedfurther, however, that such dividend shall be included in the calculation of the amount of Restricted Payments;

(4) so long as no Default has occurred and is continuing, the repurchase or other acquisition of shares of Capital Stock of the Company or any of its Subsidiaries from employees, former employees, directors or former directors of the Company or any of its Subsidiaries (or permitted transferees of such employees, former employees, directors or former directors), pursuant to the

terms of the agreements (including employment agreements) or plans (or amendments thereto) approved by the Board of Directors under which such individuals purchase or sell or are granted the option to purchase or sell, shares of such Capital Stock; provided, however, that the aggregate amount of such repurchases and other acquisitions (excluding amounts representing cancellation of Indebtedness) shall not exceed US$5 million in any calendar year; providedfurther, however, that such repurchases and other acquisitions shall be excluded in the calculation of the amount of Restricted Payments;

(5) payments of dividends on Disqualified Stock issued pursuant to Section 4.03; provided, however, that such dividends shall be excluded in the calculation of the amount of Restricted Payments;

(6) repurchases of Capital Stock deemed to occur upon exercise of stock options if such Capital Stock represents a portion of the exercise price of such options; provided, however, that such Restricted Payments shall be excluded in the calculation of the amount of Restricted Payments;

(7) cash payments in lieu of the issuance of fractional shares in connection with the exercise of warrants, options or other securities convertible into or exchangeable for Capital Stock of the Company; provided, however, that any such cash payment shall not be for the purpose of evading the limitation of this Section 4.04 (as determined in good faith by the Board of Directors); ▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇, however, that such payments shall be excluded in the calculation of the amount of Restricted Payments;

(8) in the event of a Change of Control, and if no Default shall have occurred and be continuing, the payment, purchase, redemption, defeasance or other acquisition or retirement of Subordinated Obligations of the Company or any Subsidiary Guarantor, in each case, at a purchase price not greater than 101% of the principal amount of such Subordinated Obligations, plus any accrued and unpaid interest thereon; provided, however, that prior to such payment, purchase, redemption, defeasance or other acquisition or retirement, the Company (or a third party to the extent permitted by this Indenture) has made a Change of Control Offer with respect to the Securities as a result of such Change of Control and has repurchased all Securities validly tendered and not withdrawn in connection with such Change of Control Offer; providedfurther, however, that such repurchase and other acquisitions shall be included in the calculation of the amount of Restricted Payments;

(9) payments of intercompany subordinated Indebtedness, the Incurrence of which was permitted under Section 4.03(b)(3); provided, however, that no Default has occurred and is continuing or would otherwise result therefrom; providedfurther, however, that such payments shall be excluded in the calculation of the amount of Restricted Payments; or

(10) Restricted Payments in an amount which, when taken together with all Restricted Payments made pursuant to this Section 4.04(b)(10), does not exceed US$10 million; provided, however, that (A) at the time of each such Restricted Payment, no Default shall have occurred and be continuing (or result therefrom) and (B) such dividends shall be included in the calculation of the amount of Restricted Payments.

SECTION 4.05 Limitation on Restrictions on Distributions from Restricted Subsidiaries. The Company shall not, and shall not permit any Restricted Subsidiary to, create or otherwise cause or permit to exist or become effective any consensual encumbrance or restriction on the ability of any Restricted Subsidiary to (a) pay dividends or make any other distributions on its Capital Stock to the Company or a Restricted Subsidiary or pay any Indebtedness owed to the Company, (b) make any loans or advances to the Company or (c) transfer any of its property or assets to the Company, except:

(1) with respect to clauses (a), (b) and (c),

(A) any encumbrance or restriction pursuant to an agreement in effect at or entered into on the Issue Date;

(B) any encumbrance or restriction with respect to a Restricted Subsidiary pursuant to an agreement relating to any Indebtedness Incurred by such Restricted Subsidiary on or prior to the date on which such Restricted Subsidiary was acquired by the Company (other than Indebtedness Incurred as consideration in, or to provide all or any portion of the funds or credit support utilized to consummate, the transaction or series of related transactions pursuant to which such Restricted Subsidiary became a Restricted Subsidiary or was acquired by the Company) and outstanding on such date;

(C) any encumbrance or restriction pursuant to an agreement effecting a Refinancing of Indebtedness Incurred pursuant to an agreement referred to in Section 4.05(1)(A) or (B) or this clause (C) or contained in any amendment to an agreement referred to in Section 4.05(1)(A) or (B) or this clause (C); provided, however, that the encumbrances and restrictions with respect to such Restricted Subsidiary contained in any such refinancing agreement or amendment are no less favorable to the Securityholders than encumbrances and restrictions with respect to such Restricted Subsidiary contained in such predecessor agreements; and

(D) any encumbrance or restriction with respect to a Restricted Subsidiary imposed pursuant to an agreement entered into for the sale or disposition of all or substantially all the Capital Stock or assets of such Restricted Subsidiary pending the closing of such sale or disposition; and

(2) with respect to clause (c) only,

(A) any encumbrance or restriction consisting of customary non-assignment provisions in leases governing leasehold interests to the extent such provisions restrict the transfer of the lease or the property leased thereunder;

(B) any encumbrance or restriction contained in security agreements or mortgages securing Indebtedness of a Restricted Subsidiary to the extent such encumbrance or restriction restricts the transfer of the property subject to such security agreements or mortgages; and

(C) customary provisions in partnership agreements, limited liability company organizational governance documents, joint venture agreements and other similar agreements entered into in the ordinary course of business that restrict the transfer of ownership interests in such partnership, limited liability company, joint venture or similar Person.

SECTION 4.06 Limitation on Sales of Assets and Subsidiary Stock. (a) The Company shall not, and shall not permit any Restricted Subsidiary to, directly or indirectly, consummate any Asset Disposition unless:

(1) the Company or such Restricted Subsidiary receives consideration at the time of such Asset Disposition at least equal to the fair market value (including as to the value of all non-cash consideration), as determined in good faith by the Board of Directors, of the shares and assets subject to such Asset Disposition;

(2) except in the case of a Permitted Asset Swap, at least 75% of the consideration thereof received by the Company or such Restricted Subsidiary is in the form of cash or cash equivalents; and

(3) an amount equal to 100% of the Net Available Cash from such Asset Disposition is applied by the Company (or such Restricted Subsidiary, as the case may be)

(A) first, to the extent the Company elects (or is required by the terms of any Indebtedness), (x) to prepay, repay, redeem, purchase, defease or otherwise acquire Senior Indebtedness of the Company or Indebtedness (other than any Disqualified Stock) of a Wholly Owned Subsidiary (in each case other than Indebtedness owed to the Company or an Affiliate of the Company) or (y) repay any Indebtedness that was secured by the assets sold in such Asset Disposition, in each case within one year from the later of the date of such Asset Disposition or the receipt of such Net Available Cash;

(B) second, to the extent of the balance of such Net Available Cash after application in accordance with clause (A), to the extent the Company elects, to acquire Additional Assets within one year from the later of the date of such Asset Disposition or the receipt of such Net Available Cash; and

(C) third, to the extent of the balance of such Net Available Cash after application in accordance with clauses (A) and (B), to make an Offer to the Holders of the Securities (and to holders of other Senior Indebtedness of the Company designated by the Company) to purchase Securities (and such other Senior Indebtedness of the Company) pursuant to and subject to the conditions of this Section 4.06;

provided, however, that in connection with any prepayment, repayment, purchase, redemption, defeasance or other acquisition of Indebtedness pursuant to clause (A) or (C) above, the Company or such Restricted Subsidiary shall permanently retire such Indebtedness and shall cause the related loan commitment (if any) to be permanently reduced in an amount equal to the principal amount so prepaid, repaid, purchased, redeemed, defeased or otherwise acquired.

Notwithstanding the foregoing provisions of this Section 4.06, the Company and the Restricted Subsidiaries shall not be required to apply any Net Available Cash in accordance with this Section 4.06(a) except to the extent that the aggregate Net Available Cash from all Asset Dispositions which is not applied in accordance with this Section 4.06(a) exceeds US$10 million. Pending application of Net Available Cash pursuant to this Section 4.06(a), such Net Available Cash shall be invested in Temporary Cash Investments or applied to temporarily reduce revolving credit indebtedness.

For the purposes of this Section 4.06(a), the following are deemed to be cash or cash equivalents: (i) the assumption of Indebtedness of the Company (other than Obligations in respect of Disqualified Stock of the Company) or any Restricted Subsidiary (other than Obligations in respect of Disqualified Stock or Preferred Stock of a Subsidiary Guarantor) and the release of the Company or such Restricted Subsidiary from all liability on such Indebtedness in connection with such Asset Disposition and (ii) securities received by the Company or any Restricted Subsidiary from the transferee that are promptly converted within 30 days by the Company or such Restricted Subsidiary into cash, to the extent of the cash received in that conversion.

(b) In the event of an Asset Disposition that requires the purchase of Securities (and other Senior Indebtedness of the Company) pursuant to Section 4.06(a)(3)(C), the Company shall purchase Securities tendered pursuant to an offer by the Company for the Securities (and such other Senior Indebtedness) (the “Offer”) at a purchase price of 100% of their principal amount (or, in the event such other

Senior Indebtedness of the Company was issued with significant original issue discount, 100% of the accreted value thereof), without premium, plus accrued but unpaid interest (or, in respect of such other Senior Indebtedness of the Company, such lesser price, if any, as may be provided for by the terms of such Senior Indebtedness) in accordance with the procedures (including prorating in the event of oversubscription) set forth in Section 4.06(c). If the aggregate purchase price of Securities tendered pursuant to the Offer exceeds the Net Available Cash allotted to their purchase, the Company shall select the Securities to be purchased on a pro rata basis but in round denominations, which in the case of the Securities will be denominations of US$1,000 principal amount or multiples thereof. The Company shall not be required to make an Offer to purchase Securities (and other Senior Indebtedness of the Company) pursuant to this Section 4.06 if the Net Available Cash available therefor is less than US$5 million (which lesser amount shall be carried forward for purposes of determining whether such an Offer is required with respect to the Net Available Cash from any subsequent Asset Disposition). Upon completion of such an Offer, Net Available Cash shall be deemed to be reduced by the aggregate amount of such Offer.

(c) (1) Promptly, and in any event within 10 days after the Company becomes obligated to make an Offer, the Company shall deliver to the Trustee and send, by first-class mail to each Holder, a written notice stating that the Holder may elect to have his Securities purchased by the Company either in whole or in part (subject to prorating as described in Section 4.06(b) in the event the Offer is oversubscribed) in integral multiples of US$1,000 of principal amount, at the applicable purchase price. The notice shall specify a purchase date not less than 30 days nor more than 60 days after the date of such notice (the “Purchase Date”) and shall contain such information concerning the business of the Company which the Company in good faith believes will enable such Holders to make an informed decision.

(1) Not later than the date upon which written notice of an Offer is delivered to the Trustee as provided below, the Company shall deliver to the Trustee an Officers’ Certificate as to (A) the amount of the Offer (the “Offer Amount”), including information as to any other Senior Indebtedness included in the Offer, (B) the allocation of the Net Available Cash from the Asset Dispositions pursuant to which such Offer is being made and (C) the compliance of such allocation with the provisions of Section 4.06(a) and (b). On such date, the Company shall also irrevocably deposit with the Trustee or with a Paying Agent (or, if the Company is acting as its own Paying Agent, segregate and hold in trust) in Temporary Cash Investments, maturing on the last day prior to the Purchase Date or on the Purchase Date if funds are immediately available by open of business, an amount equal to the Offer Amount to be held for payment in accordance with the provisions of this Section. If the Offer includes other Senior Indebtedness, the deposit described in the preceding sentence may be made with any other paying agent pursuant to arrangements satisfactory to the Trustee. Upon the expiration of the period for which the Offer remains open (the “Offer Period”), the Company shall deliver to the Trustee for cancellation the Securities or portions thereof which have been properly tendered to and are to be accepted by the Company. The Trustee shall, on the Purchase Date, mail or deliver

payment (or cause the delivery of payment) to each tendering Holder in the amount of the purchase price. In the event that the aggregate purchase price of the Securities delivered by the Company to the Trustee is less than the Offer Amount applicable to the Securities, the Trustee shall deliver the excess to the Company immediately after the expiration of the Offer Period.

(2) Holders electing to have a Security purchased shall be required to surrender the Security, with an appropriate form duly completed, to the Company at the address specified in the notice at least three Business Days prior to the Purchase Date. Holders shall be entitled to withdraw their election if the Trustee or the Company receives not later than one Business Day prior to the Purchase Date, facsimile transmission or letter setting forth the name of the Holder, the principal amount of the Security which was delivered for purchase by the Holder and a statement that such ▇▇▇▇▇▇ is withdrawing his election to have such Security purchased. Holders whose Securities are purchased only in part shall be issued new Securities equal in principal amount to the unpurchased portion of the Securities surrendered.

(3) At the time the Company delivers Securities to the Trustee which are to be accepted for purchase, the Company shall also deliver an Officers’ Certificate stating that such Securities are to be accepted by the Company pursuant to and in accordance with the terms of this Section. A Security shall be deemed to have been accepted for purchase at the time the Trustee, directly or through an agent, mails or delivers payment therefor to the surrendering Holder.

(d) The Company shall comply, to the extent applicable, with the requirements of Section 14(e) of the Exchange Act and any other securities laws or regulations in connection with the repurchase of Securities pursuant to this Section 4.06. To the extent that the provisions of any securities laws or regulations conflict with provisions of this Section 4.06, the Company shall comply with the applicable securities laws and regulations and shall not be deemed to have breached its obligations under this Section 4.06 by virtue of its compliance with such securities laws or regulations.

SECTION 4.07 Limitation on Affiliate Transactions. (a) The Company shall not, and shall not permit any Restricted Subsidiary to, enter into or permit to exist any transaction (including the purchase, sale, lease or exchange of any property, employee compensation arrangements or the rendering of any service) with, or for the benefit of, any Affiliate of the Company (an “Affiliate Transaction”) unless:

(1) the terms of the Affiliate Transaction are no less favorable to the Company or such Restricted Subsidiary than those that could be obtained at the time of the Affiliate Transaction in arm’s-length dealings with a Person who is not an Affiliate;

(2) if such Affiliate Transaction involves an amount in excess of US$1 million, the terms of the Affiliate Transaction are set forth in writing and

two Officers of the Company have certified that the criteria set forth in Section 4.07(a)(1) are satisfied in an Officers’ Certificate;

(3) if such Affiliate Transaction involves an amount in excess of US$5 million, a majority of the directors of the Company disinterested with respect to such Affiliate Transaction have determined in good faith that the criteria set forth in Section 4.07(a)(1) are satisfied and have approved the relevant Affiliate Transaction as evidenced by a resolution of the Board of Directors; provided, however, that a director will not be deemed disinterested with respect to transactions between the Company or a Restricted Subsidiary on the one hand and an immediate family member of such director or an entity affiliated with such immediate family member on the other hand; and

(4) if such Affiliate Transaction involves an amount in excess of US$25 million, the Board of Directors shall also have received a written opinion from an Independent Qualified Party to the effect that such Affiliate Transaction is fair, from a financial standpoint, to the Company and its Restricted Subsidiaries or is not less favorable to the Company and its Restricted Subsidiaries than could reasonably be expected to be obtained at the time in an arm’s-length transaction with a Person who was not an Affiliate.

(b) The provisions of Section 4.07(a) shall not prohibit:

(1) any Investment (other than a Permitted Investment) or other Restricted Payment, in each case permitted to be made pursuant to Section 4.04 (but only to the extent included in the calculation of the amount of Restricted Payments made pursuant to Section 4.04(a)(3));

(2) any issuance of securities, or other payments, awards or grants in cash, securities or otherwise pursuant to, or the funding of, employment arrangements, stock options and stock ownership plans approved by the Board of Directors;

(3) loans or advances to employees in the ordinary course of business in accordance with the past practices of the Company or its Restricted Subsidiaries, but in any event not to exceed US$2 million in the aggregate outstanding at any one time;

(4) the payment of reasonable fees to directors of the Company and its Restricted Subsidiaries who are not employees of the Company or its Restricted Subsidiaries;

(5) any transaction with a Restricted Subsidiary or joint venture or similar entity which would constitute an Affiliate Transaction solely because the Company or a Restricted Subsidiary owns an equity interest in or otherwise controls such Restricted Subsidiary, joint venture or similar entity;

(6) the issuance or sale of any Capital Stock (other than Disqualified Stock) of the Company; and

(7) transactions entered into in the ordinary course of business, consistent with past practices, on terms that are substantially similar to those that could be obtained at the time of such transactions in arm’s length dealings with a Person who is not an Affiliate.

SECTION 4.08 Limitation on Line of Business. The Company shall not, and shall not permit any Restricted Subsidiary, to engage in any business other than a Related Business.

SECTION 4.09 Limitation on the Sale or Issuance of Capital Stock of Restricted Subsidiaries. The Company:

(1) shall not, and shall not permit any Restricted Subsidiary to, sell, lease, transfer or otherwise dispose of any Capital Stock of any Restricted Subsidiary to any Person (other than to the Company or a Wholly Owned Subsidiary); and

(2) shall not permit any Restricted Subsidiary to issue any of its Capital Stock (other than, if necessary, shares of its Capital Stock constituting directors’ or other legally required qualifying shares) to any Person (other than to the Company or a Wholly Owned Subsidiary),

unless

(A) immediately after giving effect to such issuance, sale or other disposition, neither the Company nor any of its Subsidiaries own any Capital Stock of such Restricted Subsidiary; or

(B) immediately after giving effect to such issuance, sale or other disposition, such Restricted Subsidiary would no longer constitute a Restricted Subsidiary and any Investment in such Person remaining after giving effect thereto is treated as a new Investment by the Company and such Investment would be permitted to be made under Section 4.04 if made on the date of such issuance, sale or other disposition.

For purposes of this Section 4.09, the creation of a Lien on any Capital Stock of a Restricted Subsidiary to secure Indebtedness of the Company or any of its Restricted Subsidiaries will not be deemed to be a violation of this covenant; provided, however, that any sale or other disposition by the secured party of such Capital Stock following foreclosure of its Lien will be subject to this Section 4.09.

SECTION 4.10 Change of Control. (a) Upon the occurrence of a Change of Control, each Holder shall have the right to require that the Company repurchase such Holder’s Securities at a purchase price in cash equal to 101% of the principal amount thereof on the date of purchase plus accrued and unpaid interest, if any, to the date of purchase (subject to the right of Holders of record on the relevant record date to receive interest due on the relevant interest payment date), in accordance with the terms contemplated in Section 4.10(b).

(a) Within 30 days following any Change of Control, the Company shall mail a notice to each Holder with a copy to the Trustee (the “Change of Control Offer”) stating:

(1) that a Change of Control has occurred and that such Holder has the right to require the Company to purchase such Holder’s Securities at a purchase price in cash equal to 101% of the principal amount thereof on the date of purchase, plus accrued and unpaid interest, if any, to the date of purchase (subject to the right of Holders of record on the relevant record date to receive interest on the relevant interest payment date);

(2) the circumstances and relevant facts regarding such Change of Control (including information with respect to proforma historical income, cash flow and capitalization, in each case after giving effect to such Change of Control);

(3) the purchase date (which shall be no earlier than 30 days nor later than 60 days from the date such notice is mailed); and

(4) the instructions, as determined by the Company, consistent with this Section 4.10, that a Holder must follow in order to have its Securities purchased.

(b) Holders electing to have a Security purchased will be required to surrender the Security, with an appropriate form duly completed, to the Company at the address specified in the notice at least three Business Days prior to the purchase date. Holders will be entitled to withdraw their election if the Trustee or the Company receives not later than one Business Day prior to the purchase date, facsimile transmission or letter setting forth the name of the Holder, the principal amount of the Security which was delivered for purchase by the Holder and a statement that such ▇▇▇▇▇▇ is withdrawing his election to have such Security purchased.

(c) On the purchase date, all Securities purchased by the Company under this Section shall be delivered by the Company to the Trustee for cancellation, and the Company shall pay the purchase price plus accrued and unpaid interest, if any, to the Holders entitled thereto.

(d) Notwithstanding the foregoing provisions of this Section 4.10, the Company shall not be required to make a Change of Control Offer following a Change of Control if a third party makes the Change of Control Offer in the manner, at the times and otherwise in compliance with the requirements set forth in this Section 4.10 applicable to a Change of Control Offer made by the Company and purchases all Securities validly tendered and not withdrawn under such Change of Control Offer.

(e) The Company shall comply, to the extent applicable, with the requirements of Section 14(e) of the Exchange Act and any other securities laws or regulations in connection with the repurchase of Securities pursuant to this Section 4.10. To the extent that the provisions of any securities laws or regulations conflict with provisions of this Section 4.10, the Company shall comply with the applicable securities laws and regulations and shall not be deemed to have breached its obligations under this Section 4.10 by virtue of its compliance with such securities laws or regulations.

SECTION 4.11 Limitation on Liens. The Company shall not, and shall not permit any Restricted Subsidiary to, directly or indirectly, Incur or permit to exist any Lien (the “Initial Lien”) of any nature whatsoever on any of its properties (including Capital Stock of a Restricted Subsidiary), whether owned at the Issue Date or thereafter acquired securing any Indebtedness, other than Permitted Liens, without effectively providing that the Securities shall be secured equally and ratably with (or prior to) the obligations so secured for so long as such obligations are so secured. Any Lien created for the benefit of the Holders of the Securities pursuant to the foregoing sentence shall provide by its terms that such Lien shall be automatically and unconditionally released and discharged upon the release and discharge of the Initial Lien.

SECTION 4.12 Limitation on Sale/Leaseback Transactions. The Company shall not, and shall not permit any Restricted Subsidiary to, enter into any Sale/Leaseback Transaction with respect to any property unless:

(1) the Company or such Restricted Subsidiary would be entitled to (A) Incur Indebtedness in an amount equal to the Attributable Debt with respect to such Sale/Leaseback Transaction pursuant to Section 4.03 and (B) create a Lien on such property securing such Attributable Debt without equally and ratably securing the Securities pursuant to Section 4.11;

(2) the net proceeds received by the Company or any Restricted Subsidiary in connection with such Sale/Leaseback Transaction are at least equal to the fair value (as determined by the Board of Directors) of such property; and

(3) the Company applies the proceeds of such transaction in compliance with Section 4.06.

SECTION 4.13 Future Guarantors. The Company shall cause each Restricted Subsidiary that Incurs any Indebtedness to, at the same time, execute and deliver to the Trustee a Guaranty Agreement pursuant to which such Restricted

Subsidiary will Guarantee payment of the Securities on the same terms and conditions as those set forth in this Indenture.

SECTION 4.14 Additional Amounts. The Company and the Subsidiary Guarantors shall make all payments under or with respect to the Securities free and clear of and without withholding or deduction for or on account of any present or future tax, duty, levy, impost, assessment or other governmental charge (including penalties, interest and other liabilities related thereto) (hereinafter “Taxes”) imposed or levied by any jurisdiction in which the payor is organized or incorporated or resident for tax purposes or any jurisdiction from or through which any such payment is made (each a “Relevant Taxing Jurisdiction”), unless the Company or such Subsidiary Guarantor is required to withhold or deduct Taxes by law.

If the Company or any Subsidiary Guarantor is so required to withhold or deduct any amount for or on account of Taxes imposed by a Relevant Taxing Jurisdiction from any payment made under or with respect to the Securities, the Company or such Subsidiary Guarantor will be required to pay such additional amounts (“Additional Amounts”) as may be necessary so that the net amount received by the Holders (including Additional Amounts) after such withholding or deduction will not be less than the amount the Holders would have received if such Taxes had not been withheld or deducted; provided, however, no additional amounts will be paid for or on account of:

(1) Taxes that would not have been imposed but for the fact that:

(A) the Securityholder has or had a present or former connection (or imputed connection) with the Relevant Taxing Jurisdiction (including being resident, domiciled or a national of, or engaging in business or maintaining a permanent establishment in, or being physically present in, the Relevant Taxing Jurisdiction) other than by merely owning, or receiving payment under, the Securities;

(B) the Securityholder presented the Securities more than 30 days after the payment in question first became due and payable or the date on which payment thereof is duly provided for, whichever is later, except to the extent the Holder would have been entitled to the Additional Amounts if it had presented the Securities for payment during that 30 day period;

(2) estate, inheritance, gift, sales, excise, transfer, personal property or similar Taxes;

(3) Taxes payable otherwise than by withholding or deduction from payments of, or in respect of, principal of, or any premium or interest on, the Securities;

(4) Taxes imposed or withheld because the Holder failed to comply with the Company’s or such Subsidiary Guarantor’s reasonable request:

(A) to provide information concerning the nationality, residence, identity or address of the Holder; or

(B) to make any declaration or similar claim or satisfy any information or reporting requirement, required by law, regulation, or other practice of the Relevant Taxing Jurisdiction as a precondition to any exemption from all or part of any Taxes, but only to the extent the Holder is legally entitled to such exemption; or

(5) any combination of these Tax matters above.

Furthermore, the Company and the Subsidiary Guarantors shall not be required to pay any Additional Amounts with respect to any payment under the Securities to any Holder who is a fiduciary or partnership or any Person other than the sole beneficial owner of the payment, to the extent the payment would, under the laws of the Relevant Taxing Jurisdiction, be treated as being derived or received for tax purposes by a beneficiary or settlor with respect to the fiduciary or a member of the partnership or a beneficial owner who would not have been entitled to the Additional Amounts had it been the Securityholder.

Upon request, the Company shall provide the Trustee with official receipts or other documentation satisfactory to the Trustee evidencing the payment of the Taxes with respect to which Additional Amounts are paid.

Whenever in this Indenture there is mentioned, in any context:

(1) the payment of principal;

(2) purchase prices in connection with a purchase of Securities;

(3) interest; or

(4) any other amount payable on or with respect to any of the Securities,

such reference shall be deemed to include payment of Additional Amounts as required by this Section 4.14 to the extent that, in such context, Additional Amounts are, were or would be payable in respect thereof.

The Company shall pay any present or future stamp, documentary or other similar excise taxes, governmental charges or levies that arise in any jurisdiction from the execution, delivery, enforcement or registration of the Securities, this Indenture or any other document or instrument related to them (including any such Taxes that are referred to as “court” or “property” Taxes) excluding such Taxes, charges or levies imposed by any jurisdiction outside of the United Mexican States and the jurisdiction of incorporation of any Subsidiary Guarantor, the jurisdiction of incorporation of any successor of the

Company or any jurisdiction in which a paying agent of the Company, a Successor Company or a Subsidiary Guarantor (as the case may be) is located, and the Company shall indemnify the Holders for any such Taxes paid by such Holders.

The obligations of the Company and the Subsidiary Guarantors in this Section 4.14 shall survive any termination, defeasance or discharge of this Indenture and will apply mutatismutandis to any jurisdiction in which any successor Person to the Company or any Subsidiary Guarantor is organized or any political subdivision or taxing authority or agency thereof or therein.

SECTION 4.15 Compliance Certificate. The Company shall deliver to the Trustee within 120 days after the end of each fiscal year of the Company an Officers’ Certificate stating that in the course of the performance by the signers of their duties as Officers of the Company they would normally have knowledge of any Default and whether or not the signers know of any Default that occurred during such period. If they do, the certificate shall describe the Default, its status and what action the Company is taking or proposes to take with respect thereto. The Company also shall comply with TIA § 314(a)(4).

SECTION 4.16 Further Instruments and Acts. Upon request of the Trustee, the Company will execute and deliver such further instruments and do such further acts as may be reasonably necessary or proper to carry out more effectively the purpose of this Indenture.

Article 5

Successor Company

SECTION 5.01 When Company May Merge or Transfer Assets. (a) The Company shall not consolidate with or merge with or into, or convey, transfer or lease, in one transaction or a series of transactions, directly or indirectly, all or substantially all its assets to, any Person, unless:

(1) the resulting, surviving or transferee Person (the “Successor Company”) shall be a Person organized and existing under the laws of the United Mexican States or the laws of any political subdivision thereof, the laws of the United States of America, any State thereof or the District of Columbia, or the European Union or any if its member nations and the Successor Company (if not the Company) shall expressly assume, by an indenture supplemental hereto, executed and delivered to the Trustee, in form satisfactory to the Trustee, all the obligations of the predecessor Company under the Securities and this Indenture;

(2) immediately after giving proforma effect to such transaction (and treating any Indebtedness which becomes an obligation of the Successor Company or any Subsidiary as a result of such transaction as having been Incurred by the Successor Company or such Subsidiary at the time of such transaction), no Default shall have occurred and be continuing;

(3) immediately after giving proforma effect to such transaction, the Successor Company would be able to Incur an additional US$1.00 of Indebtedness pursuant to Section 4.03(a);

(4) the Company shall have delivered to the Trustee an Officers’ Certificate and an Opinion of Counsel, each stating that such consolidation, merger or transfer and such supplemental indenture (if any) comply with this Indenture;

(5) the Company shall have delivered to the Trustee an Opinion of Counsel to the effect that the Holders will not recognize income, gain or loss for U.S. Federal income tax purposes as a result of such transaction and will be subject to U.S. Federal income tax on the same amounts, in the same manner and at the same times as would have been the case if such transaction had not occurred; and

(6) the Company shall have delivered an Opinion of Counsel in the United Mexican States to the effect that the Holders of the Securities will not recognize income, gain or loss for income tax purposes of such jurisdiction as a result of such transaction and will be subject to income tax in such jurisdiction on the same amounts, in the same manner and at the same times as would have been the case if such transaction had not occurred;

provided, however, that clause (3) will not be applicable to (A) a Restricted Subsidiary consolidating with, merging into or transferring all or part of its properties and assets to the Company or a Subsidiary Guarantor or (B) the Company merging with an Affiliate of the Company solely for the purpose and with the sole effect of reincorporating the Company in another jurisdiction.

For purposes of this Section 5.01(a), the sale, lease, conveyance, assignment, transfer or other disposition of all or substantially all of the properties and assets of one or more Subsidiaries of the Company, which properties and assets, if held by the Company instead of such Subsidiaries, would constitute all or substantially all of the properties and assets of the Company on a consolidated basis, shall be deemed to be the transfer of all or substantially all of the properties and assets of the Company.

The Successor Company shall be the successor to the Company and shall succeed to, and be substituted for, and may exercise every right and power of, the Company under this Indenture, and the predecessor Company, except in the case of a lease, shall be released from the obligation to pay the principal of and interest on the Securities.

(b) The Company shall not permit any Subsidiary Guarantor to consolidate with or merge with or into, or convey, transfer or lease, in one transaction or series of transactions, all or substantially all of its assets to any Person unless:

(1) except in the case of a Subsidiary Guarantor (x) that has been disposed of in its entirety to another Person (other than to the Company or an Affiliate of the Company), whether through a merger, consolidation or sale of Capital Stock or assets or (y) that, as a result of a disposition of all or a portion of its Capital Stock, ceases to be a Subsidiary, the resulting, surviving or transferee Person (if not such Subsidiary) shall be a Person organized and existing under the laws of the jurisdiction under which such Subsidiary was organized or under the laws of the United States of America, or any State thereof or the District of Columbia or the United Mexican States, and such Person shall expressly assume, by a Guaranty Agreement, in a form satisfactory to the Trustee, all the obligations of such Subsidiary, if any, under its Subsidiary Guaranty;

(2) immediately after giving effect to such transaction or transactions on a proforma basis (and treating any Indebtedness which becomes an obligation of the resulting, surviving or transferee Person as a result of such transaction as having been issued by such Person at the time of such transaction), no Default shall have occurred and be continuing; and

(3) the Company delivers to the Trustee an Officers’ Certificate and an Opinion of Counsel, each stating that such consolidation, merger or transfer and such Guaranty Agreement, is legal, valid and binding and is enforceable against the successor Subsidiary Guarantor and complies with this Indenture.

Article 6

Defaults and Remedies

SECTION 6.01 Events of Default. An “Event of Default” occurs if:

(1) the Company defaults in any payment of interest on any Security when the same becomes due and payable, and such default continues for a period of 30 days;

(2) the Company (A) defaults in the payment of the principal of any Security when the same becomes due and payable at its Stated Maturity, upon optional redemption (including for redemption for changes in withholding taxes), upon declaration of acceleration or otherwise, or (B) fails to purchase Securities when required pursuant to this Indenture or the Securities;

(3) the Company fails to comply with Section 5.01;

(4) the Company fails to comply with Section 4.02, 4.03, 4.04, 4.05, 4.06, 4.07, 4.08, 4.09, 4.10, 4.11, 4.12, or 4.13 (other than a failure to purchase Securities when required under Section 4.06 or 4.10) and such failure continues for 30 days after the notice specified below;

(5) the Company or any Subsidiary Guarantor fails to comply with any of its agreements in the Securities or this Indenture (other than those referred to in clause (1), (2), (3) or (4) above) and such failure continues for 60 days after the notice specified below;

(6) Indebtedness of the Company, any Subsidiary Guarantor or any Significant Subsidiary is not paid within any applicable grace period after final maturity or is accelerated by the Holders thereof because of a default and the total amount of such Indebtedness unpaid or accelerated exceeds US$20 million, or its foreign currency equivalent at the time;

(7) the Company, a Subsidiary Guarantor or any Significant Subsidiary pursuant to or within the meaning of any Bankruptcy Law:

(A) commences a voluntary case;

(B) consents to the entry of an order for relief against it in an involuntary case;

(D) makes a general assignment for the benefit of its creditors;

or takes any comparable action under any foreign laws relating to insolvency;

(8) a court of competent jurisdiction enters an order or decree under any Bankruptcy Law that:

(A) is for relief against the Company, a Subsidiary Guarantor or any Significant Subsidiary in an involuntary case;

(B) appoints a Custodian of the Company, a Subsidiary Guarantor or any Significant Subsidiary or for any substantial part of its property; or

or any similar relief is granted under any foreign laws and the order or decree remains unstayed and in effect for 60 days;

(9) any judgment or decree for the payment of money in excess of US$20 million or its foreign currency equivalent at the time is entered against the Company, a Subsidiary Guarantor or any Significant Subsidiary, remains

outstanding for a period of 60 days following the entry of such judgment or decree and is not discharged, waived or the execution thereof stayed; or

(10) a Subsidiary Guaranty ceases to be in full force and effect (other than in accordance with the terms of such Subsidiary Guaranty) or a Subsidiary Guarantor denies or disaffirms its obligations under its Subsidiary Guaranty.

The foregoing will constitute Events of Default whatever the reason for any such Event of Default and whether it is voluntary or involuntary or is effected by operation of law or pursuant to any judgment, decree or order of any court or any order, rule or regulation of any administrative or governmental body.

The term “Bankruptcy Law” means Title 11, United States Code, the “Ley de Concursos Mercantiles” of Mexico, or any similar Federal or state law for the relief of debtors. The term “Custodian” means any receiver, trustee, assignee, liquidator, custodian, “síndico”, “visitador”, “conciliador” or similar official under any Bankruptcy Law.

A Default under clauses (4) or (5) is not an Event of Default until the Trustee or the Holders of at least 25% in principal amount of the outstanding Securities notify the Company of the Default and the Company does not cure such Default within the time specified after receipt of such notice. Such notice must specify the Default, demand that it be remedied and state that such notice is a “Notice of Default”.

The Company shall deliver to the Trustee, within 30 days after the occurrence thereof, written notice in the form of an Officers’ Certificate of any Event of Default under clause (6) or (10) and any event which with the giving of notice or the lapse of time would become an Event of Default under clause (4), (5) or (9), its status and what action the Company is taking or proposes to take with respect thereto.

SECTION 6.02 Acceleration. If an Event of Default (other than an Event of Default specified in Section 6.01(7) or (8) with respect to the Company) occurs and is continuing, the Trustee by notice to the Company, or the Holders of at least 25% in principal amount of the Securities by notice to the Company and the Trustee, may declare the principal of and accrued but unpaid interest on all the Securities to be due and payable. Upon such a declaration, such principal and interest shall be due and payable immediately. If an Event of Default specified in Section 6.01(7) or (8) with respect to the Company occurs, the principal of and interest on all the Securities shall ipsofacto become and be immediately due and payable without any declaration or other act on the part of the Trustee or any Securityholders. The Holders of a majority in principal amount of the Securities by notice to the Trustee may rescind an acceleration and its consequences if the rescission would not conflict with any judgment or decree and if all existing Events of Default have been cured or waived except nonpayment of principal or interest that has become due solely because of acceleration. No such rescission shall affect any subsequent Default or impair any right consequent thereto.

SECTION 6.03 Other Remedies. If an Event of Default occurs and is continuing, the Trustee may pursue any available remedy to collect the payment of principal of or interest on the Securities or to enforce the performance of any provision of the Securities or this Indenture.

The Trustee may maintain a proceeding even if it does not possess any of the Securities or does not produce any of them in the proceeding. A delay or omission by the Trustee or any Securityholder in exercising any right or remedy accruing upon an Event of Default shall not impair the right or remedy or constitute a waiver of or acquiescence in the Event of Default. No remedy is exclusive of any other remedy. All available remedies are cumulative.

SECTION 6.04 Waiver of Past Defaults. The Holders of a majority in principal amount of the Securities by notice to the Trustee may waive an existing Default and its consequences except (a) a Default in the payment of the principal of or interest on a Security (b) a Default arising from the failure to redeem or purchase any Security when required pursuant to this Indenture or (c) a Default in respect of a provision that under Section 9.02 cannot be amended without the consent of each Securityholder affected. When a Default is waived, it is deemed cured, but no such waiver shall extend to any subsequent or other Default or impair any consequent right.

SECTION 6.05 Control by Majority. The Holders of a majority in principal amount of the Securities may direct the time, method and place of conducting any proceeding for any remedy available to the Trustee or of exercising any trust or power conferred on the Trustee. However, the Trustee may refuse to follow any direction that conflicts with law or this Indenture or, subject to Section 7.01, that the Trustee determines is unduly prejudicial to the rights of other Securityholders or would involve the Trustee in personal liability; provided, however, that the Trustee may take any other action deemed proper by the Trustee that is not inconsistent with such direction. Prior to taking any action hereunder, the Trustee shall be entitled to indemnification satisfactory to it in its sole discretion against all losses and expenses caused by taking or not taking such action.

SECTION 6.06 Limitation on Suits. Except to enforce the right to receive payment of principal, premium (if any) or interest when due, no Securityholder may pursue any remedy with respect to this Indenture or the Securities unless:

(1) the Holder gives to the Trustee written notice stating that an Event of Default is continuing;

(2) the Holders of at least 25% in principal amount of the Securities make a written request to the Trustee to pursue the remedy;

(3) such Holder or Holders and, if requested, offer to the Trustee security or indemnity satisfactory to it against any loss, liability or expense;

(4) the Trustee does not comply with the request within 60 days after receipt of the request and, if requested, the offer of security or indemnity; and

(5) the Holders of a majority in principal amount of the Securities do not give the Trustee a direction inconsistent with the request during such 60-day period.

A Securityholder may not use this Indenture to prejudice the rights of another Securityholder or to obtain a preference or priority over another Securityholder.

SECTION 6.07 Rights of Holders to Receive Payment. Notwithstanding any other provision of this Indenture, the right of any Holder to receive payment of principal of and interest on the Securities held by such Holder, on or after the respective due dates expressed in the Securities, or to bring suit for the enforcement of any such payment on or after such respective dates, shall not be impaired or affected without the consent of such Holder.

SECTION 6.08 Collection Suit by Trustee. If an Event of Default specified in Section 6.01(1) or (2) occurs and is continuing, the Trustee may recover judgment in its own name and as trustee of an express trust against the Company or a Subsidiary Guarantor for the whole amount then due and owing (together with interest on any unpaid interest to the extent lawful) and the amounts provided for in Section 7.07.

SECTION 6.09 Trustee May File Proofs of Claim. The Trustee may file such proofs of claim and other papers or documents as may be necessary or advisable in order to have the claims of the Trustee and the Securityholders allowed in any judicial proceedings relative to the Company or any Subsidiary Guarantor, its creditors or its property and, unless prohibited by law or applicable regulations, may vote on behalf of the Holders in any election of a trustee in bankruptcy or other Person performing similar functions, and any Custodian in any such judicial proceeding is hereby authorized by each Holder to make payments to the Trustee and, in the event that the Trustee shall consent to the making of such payments directly to the Holders, to pay to the Trustee any amount due it for the reasonable compensation, expenses, disbursements and advances of the Trustee, its agents and its counsel, and any other amounts due the Trustee under Section 7.07.

Priorities. If the Trustee collects any money or property pursuant to this Article 6, it shall pay out the money or property in the following order:

FIRST: to the Trustee for amounts due under Section 7.07;

SECOND: to Securityholders for amounts due and unpaid on the Securities for principal and interest, ratably, without preference or priority of any

kind, according to the amounts due and payable on the Securities for principal and interest, respectively; and

THIRD: to the Company.

The Trustee may fix a record date and payment date for any payment to Securityholders pursuant to this Section. At least 15 days before such record date, the Company shall mail to each Securityholder and the Trustee a notice that states the record date, the payment date and amount to be paid.

SECTION 6.10 Undertaking for Costs. In any suit for the enforcement of any right or remedy under this Indenture or in any suit against the Trustee for any action taken or omitted by it as Trustee, a court in its discretion may require the filing by any party litigant in the suit of an undertaking to pay the costs of the suit, and the court in its discretion may assess reasonable costs, including reasonable attorneys’ fees and expenses, against any party litigant in the suit, having due regard to the merits and good faith of the claims or defenses made by the party litigant. This Section does not apply to a suit by the Trustee, a suit by a Holder pursuant to Section 6.07 or a suit by Holders of more than 10% in principal amount of the Securities.

SECTION 6.11 Waiver of Stay or Extension Laws. The Company (to the extent it may lawfully do so) shall not at any time insist upon, or plead, or in any manner whatsoever claim or take the benefit or advantage of, any stay or extension law wherever enacted, now or at any time hereafter in force, which may affect the covenants or the performance of this Indenture; and the Company (to the extent that it may lawfully do so) hereby expressly waives all benefit or advantage of any such law, and shall not hinder, delay or impede the execution of any power herein granted to the Trustee, but shall suffer and permit the execution of every such power as though no such law had been enacted.

Article 7

Trustee

SECTION 7.01 Duties of Trustee. (a) If an Event of Default has occurred and is continuing, the Trustee shall exercise the rights and powers vested in it by this Indenture and use the same degree of care and skill in their exercise as a prudent Person would exercise or use under the circumstances in the conduct of such Person’s own affairs.

(a) Except during the continuance of an Event of Default:

(1) the Trustee undertakes to perform such duties and only such duties as are specifically set forth in this Indenture and no implied covenants or obligations shall be read into this Indenture against the Trustee; and

(2) in the absence of bad faith on its part, the Trustee may conclusively rely, as to the truth of the statements and the correctness of the opinions expressed therein, upon certificates or opinions furnished to the Trustee and conforming to the requirements of this Indenture. However, in the case of any such certificates or opinions which by any provision hereof are specifically required to be furnished to the Trustee, the Trustee shall examine the certificates and opinions to determine whether or not they conform to the requirements of this Indenture (but need not confirm or investigate the accuracy of mathematical calculations or other facts stated therein).

(b) The Trustee may not be relieved from liability for its own negligent action, its own negligent failure to act or its own wilful misconduct, except that:

(1) this paragraph does not limit the effect of paragraph (b) of this Section;

(2) the Trustee shall not be liable for any error of judgment made in good faith by a Trust Officer unless it is proved that the Trustee was negligent in ascertaining the pertinent facts; and

(3) the Trustee shall not be liable with respect to any action it takes or omits to take in good faith in accordance with a direction received by it pursuant to Section 6.05.

(c) Every provision of this Indenture that in any way relates to the Trustee is subject to paragraphs (a), (b) and (c) of this Section.

(d) The Trustee shall not be liable for interest on any money received by it except as the Trustee may agree in writing with the Company.

(e) Money held in trust by the Trustee need not be segregated from other funds except to the extent required by law.

(f) No provision of this Indenture shall require the Trustee to expend or risk its own funds or otherwise incur financial liability in the performance of any of its duties hereunder or in the exercise of any of its rights or powers, if it shall have reasonable grounds to believe that repayment of such funds or adequate indemnity against such risk or liability is not reasonably assured to it.

(g) Every provision of this Indenture relating to the conduct or affecting the liability of or affording protection to the Trustee shall be subject to the provisions of this Section and to the provisions of the TIA.

SECTION 7.02 Rights of Trustee. (a) The Trustee may conclusively rely and shall be protected in acting or refraining from acting on any document believed

by it to be genuine and to have been signed or presented by the proper person. The Trustee need not investigate any fact or matter stated in the document.

(a) Before the Trustee acts or refrains from acting, it may require an Officers’ Certificate or an Opinion of Counsel. The Trustee shall not be liable for any action it takes or omits to take in good faith in reliance on the Officers’ Certificate or Opinion of Counsel.

(b) The Trustee may act through agents or attorneys and shall not be responsible for the misconduct or negligence of any agent or attorney appointed with due care.

(c) The Trustee shall not be liable for any action it takes or omits to take in good faith which it believes to be authorized or within its rights or powers; provided, however, that the Trustee’s conduct does not constitute wilful misconduct, bad faith or negligence.

(d) The Trustee may consult with counsel of its selection, and the advice or opinion of counsel with respect to legal matters relating to this Indenture and the Securities shall be full and complete authorization and protection from liability in respect to any action taken, omitted or suffered by it hereunder in good faith and in accordance with the advice or opinion of such counsel.

(e) Trustee shall be under no obligation to exercise any of the rights or powers vested in it by this Indenture at the request or direction of any of the Holders pursuant to this Indenture, unless such Holders shall have offered to the Trustee security or indemnity satisfactory to the Trustee against the costs, expenses and liabilities which might be incurred by it in compliance with such request or direction.

(f) The rights, privileges, protections, immunities and benefits given to the Trustee, including, without limitation, its right to be indemnified, are extended to, and shall be enforceable by, the Trustee in each of its capacities hereunder, and each agent, custodian and other Person employed to act hereunder.

(g) The Trustee shall not be deemed to have notice of any Default or Event of Default unless a Trust Officer of the Trustee has actual knowledge thereof or unless written notice of any event which is in fact such a default is received by the Trustee at the corporate trust office of the Trustee, and such notice references the Securities and this Indenture.

(h) In no event shall the Trustee be responsible or liable for special, indirect, or consequential loss or damage of any kind whatsoever (including, but not limited to, loss of profit) irrespective of whether the Trustee has been advised of the likelihood of such loss or damage and regardless of the form of action.

(i) The Trustee may request that the Company deliver an Officers’ Certificate setting forth the names of individuals and/or titles of officers authorized at such time to take specified actions pursuant to this Indenture, which Officers’ Certificate

may be signed by any person authorized to sign an Officers’ Certificate, including any person specified as so authorized in any such certificate previously delivered and not superseded.

SECTION 7.03 Individual Rights of Trustee. The Trustee in its individual or any other capacity may become the owner or pledgee of Securities and may otherwise deal with the Company or its Affiliates with the same rights it would have if it were not Trustee. Any Paying Agent, Registrar, co-registrar or co-paying agent may do the same with like rights. However, the Trustee must comply with Sections 7.10 and 7.11.

SECTION 7.04 Trustee’s Disclaimer. The Trustee shall not be responsible for and makes no representation as to the validity or adequacy of this Indenture or the Securities, it shall not be accountable for the Company’s use of the proceeds from the Securities, and it shall not be responsible for any statement of the Company in the Indenture or in any document issued in connection with the sale of the Securities or in the Securities other than the Trustee’s certificate of authentication.

SECTION 7.05 Notice of Defaults. If a Default occurs and is continuing and if it is known to the Trustee, the Trustee shall mail to each Securityholder notice of the Default within 90 days after it occurs. Except in the case of a Default in payment of principal of or interest on any Security (including payments pursuant to the mandatory redemption provisions of such Security, if any), the Trustee may withhold the notice if and so long as a committee of its Trust Officers in good faith determines that withholding the notice is in the interests of Securityholders.

SECTION 7.06 Reports by Trustee to Holders. As promptly as practicable after each December 1 beginning with the December 1 following the date of this Indenture, and in any event prior to February 1 in each year, the Trustee shall mail to each Securityholder a brief report dated as of December 1 that complies with TIA § 313(a). The Trustee also shall comply with TIA § 313(b).

A copy of each report at the time of its mailing to Securityholders shall be filed with the SEC and each stock exchange (if any) on which the Securities are listed. The Company agrees to notify promptly the Trustee whenever the Securities become listed on any stock exchange and of any delisting thereof.

SECTION 7.07 Compensation and Indemnity. The Company shall pay to the Trustee from time to time reasonable compensation for its services. The Trustee’s compensation shall not be limited by any law on compensation of a trustee of an express trust. The Company shall reimburse the Trustee upon request for all reasonable out-of-pocket expenses incurred or made by it, including costs of collection, in addition to the compensation for its services. Such expenses shall include the reasonable compensation and expenses, disbursements and advances of the Trustee’s agents, counsel, accountants and experts. Each of the Company and the Subsidiary Guarantors, jointly and severally, shall indemnify the Trustee and each of its directors, officers, employees and agents against any and all loss, damage, claims, liability or expense (including attorneys’ fees)

incurred by it, in the absence of negligence, bad faith or willful misconduct on the part of the Trustee, in connection with the administration of this trust and the performance of its duties hereunder including the costs and expenses of defending itself against any claim (whether asserted by the Company, any Holder or any other Person). The Trustee shall notify the Company promptly of any claim of which a Trust Officer has received notice for which it may seek indemnity. Failure by the Trustee to so notify the Company shall not relieve the Company of its obligations hereunder. The Company shall defend the claim and the Trustee may have separate counsel and the Company shall pay the fees and expenses of such counsel. The Company need not reimburse any expense or indemnify against any loss, damage, claims, liability or expense incurred by the Trustee through the Trustee’s own wilful misconduct, bad faith or negligence.

To secure the Company’s payment obligations in this Section, the Trustee shall have a lien prior to the Securities on all money or property held or collected by the Trustee other than money or property held in trust to pay principal of and interest on particular Securities.

The Company’s payment obligations pursuant to this Section shall survive the discharge of this Indenture. When the Trustee incurs expenses after the occurrence of a Default specified in Section 6.01(7) or (8) with respect to the Company, the expenses are intended to constitute expenses of administration under the Bankruptcy Law.

SECTION 7.08 Replacement of Trustee. The Trustee may resign at any time by so notifying the Company. The Holders of a majority in principal amount of the Securities may remove the Trustee by so notifying the Trustee and may appoint a successor Trustee. The Company shall remove the Trustee if:

(1) the Trustee fails to comply with Section 7.10;

(2) the Trustee is adjudged bankrupt or insolvent;

(3) a receiver or other public officer takes charge of the Trustee or its property; or

(4) the Trustee otherwise becomes incapable of acting.

If the Trustee resigns, is removed by the Company or by the Holders of a majority in principal amount of the Securities and such Holders do not reasonably promptly appoint a successor Trustee, or if a vacancy exists in the office of Trustee for any reason (the Trustee in such event being referred to herein as the retiring Trustee), the Company shall promptly appoint a successor Trustee.

A successor Trustee shall deliver a written acceptance of its appointment to the retiring Trustee and to the Company. Thereupon the resignation or removal of the retiring Trustee shall become effective, and the successor Trustee shall have all the rights, powers and duties of the Trustee under this Indenture. The successor Trustee shall mail a notice of its succession to Securityholders. The retiring Trustee shall promptly transfer

all property held by it as Trustee to the successor Trustee, subject to the lien provided for in Section 7.07.

If a successor Trustee does not take office within 60 days after the retiring Trustee resigns or is removed, the retiring Trustee or the Holders of 10% in principal amount of the Securities may petition any court of competent jurisdiction for the appointment of a successor Trustee.

If the Trustee fails to comply with Section 7.10, any Securityholder may petition any court of competent jurisdiction for the removal of the Trustee and the appointment of a successor Trustee.

Notwithstanding the resignation, removal or replacement of the Trustee pursuant to this Section, the Company’s obligations under Section 7.07 shall continue for the benefit of the retiring Trustee.

SECTION 7.09 Successor Trustee by ▇▇▇▇▇▇. If the Trustee consolidates with, merges or converts into, or transfers all or substantially all its corporate trust business or assets to, another corporation or banking association, the resulting, surviving or transferee corporation without any further act shall be the successor Trustee.

In case at the time such successor or successors by merger, conversion or consolidation to the Trustee shall succeed to the trusts created by this Indenture any of the Securities shall have been authenticated but not delivered, any such successor to the Trustee may adopt the certificate of authentication of any predecessor trustee, and deliver such Securities so authenticated; and in case at that time any of the Securities shall not have been authenticated, any successor to the Trustee may authenticate such Securities either in the name of any predecessor hereunder or in the name of the successor to the Trustee; and in all such cases such certificates shall have the full force which it is anywhere in the Securities or in this Indenture provided that the certificate of the Trustee shall have.

SECTION 7.10 Eligibility; Disqualification. The Trustee shall at all times satisfy the requirements of TIA § 310(a). The Trustee shall have a combined capital and surplus of at least US$50,000,000 as set forth in its most recent published annual report of condition. The Trustee shall comply with TIA § 310(b); provided, however, that there shall be excluded from the operation of TIA § 310(b)(1) any indenture or indentures under which other securities or certificates of interest or participation in other securities of the Company are outstanding if the requirements for such exclusion set forth in TIA § 310(b)(1) are met.

SECTION 7.11 Preferential Collection of Claims Against Company. The Trustee shall comply with TIA § 311(a), excluding any creditor relationship listed in TIA § 311(b). A Trustee who has resigned or been removed shall be subject to TIA § 311(a) to the extent indicated.

SECTION 7.12 Appointment of Co-Trustee. It is the purpose of this Indenture that there shall be no violation of any law of any jurisdiction denying or restricting the right of banking corporations or associations to transact business as trustee in such jurisdiction. It is recognized that in case of litigation under this Indenture, and in particular in case of the enforcement thereof on default, or in the case the Trustee deems that by reason of any present or future law of any jurisdiction it may not exercise any of the powers, rights or remedies herein granted to the Trustee or hold title to the properties, in trust, as herein granted or take any action which may be desirable or necessary in connection therewith, it may be necessary that the Trustee appoint an individual or institution as a separate or co-trustee. The following provisions of this Section are adopted to these ends.

In the event that the Trustee appoints an additional individual or institution as a separate or co-trustee, each and every remedy, power, right, claim, demand, cause of action, immunity, estate, title, interest and lien expressed or intended by this Indenture to be exercised by or vested in or conveyed to the Trustee with respect thereto shall be exercisable by and vest in such separate or co-trustee but only to the extent necessary to enable such separate or co-trustee to exercise such powers, rights and remedies, and only to the extent that the Trustee by the laws of any jurisdiction is incapable of exercising such powers, rights and remedies and every covenant and obligation necessary to the exercise thereof by such separate or co-trustee shall run to and be enforceable by either of them.

Should any instrument in writing from the Company be required by the separate or co-trustee so appointed by the Trustee for more fully and certainly vesting in and confirming to it such properties, rights, powers, trusts, duties and obligations, any and all such instruments in writing shall, on request, be executed, acknowledged and delivered by the Company; provided, that if an Event of Default shall have occurred and be continuing, if the Company does not execute any such instrument within 15 days after request therefor, the Trustee shall be empowered as an attorney-in-fact for the Company to execute any such instrument in the Company’s name and stead. In case any separate or co-trustee or a successor to either shall die, become incapable of acting, resign or be removed, all the estates, properties, rights, powers, trusts, duties and obligations of such separate or co-trustee, so far as permitted by law, shall vest in and be exercised by the Trustee until the appointment of a new trustee or successor to such separate or co-trustee.

Every separate trustee and co-trustee shall, to the extent permitted by law, be appointed and act subject to the following provisions and conditions:

(1) all rights and powers, conferred or imposed upon the Trustee shall be conferred or imposed upon and may be exercised or performed by such separate trustee or co-trustee; and

(2) no trustee hereunder shall be personally liable by reason of any act or omission of any other trustee hereunder.

Any notice, request or other writing given to the Trustee shall be deemed to have been given to each of the then separate trustees and co-trustees, as effectively as if given to each of them. Every instrument appointing any separate trustee or co-trustee shall refer to this Indenture and the conditions of this Article.

Any separate trustee or co-trustee may at any time appoint the Trustee as its agent or attorney-in-fact with full power and authority, to the extent not prohibited by law, to do any lawful act under or in respect of this Indenture on its behalf and in its name. If any separate trustee or co-trustee shall die, become incapable of acting, resign or be removed, all of its estates, properties, rights, remedies and trusts shall vest in and be exercised by the Trustee, to the extent permitted by law, without the appointment of a new or successor trustee.

Article 8

Discharge of Indenture; Defeasance

SECTION 8.01 Discharge of Liability on Securities; Defeasance. (a) When (1) the Company delivers to the Trustee all outstanding Securities (other than Securities replaced pursuant to Section 2.07) for cancellation or (2) all outstanding Securities have become due and payable, whether at maturity or on a redemption date as a result of the mailing of a notice of redemption pursuant to Article 3 hereof and the Company irrevocably deposits with the Trustee funds sufficient to pay at maturity or upon redemption all outstanding Securities, including interest thereon to maturity or such redemption date (other than Securities replaced pursuant to Section 2.07), and if in either case the Company pays all other sums payable hereunder by the Company, then this Indenture shall, subject to Section 8.01(c), cease to be of further effect. The Trustee shall acknowledge satisfaction and discharge of this Indenture on demand of the Company accompanied by an Officers’ Certificate and an Opinion of Counsel and at the cost and expense of the Company.

(a) Subject to Sections 8.01(c) and 8.02, the Company at any time may terminate (1) all its obligations under the Securities and this Indenture (“legal defeasance option”) or (2) its obligations under Sections 4.02, 4.03, 4.04, 4.05, 4.06, 4.07, 4.08, 4.09, 4.10, 4.11, 4.12 and 4.13 and the operation of Sections 6.01(4), 6.01(6), 6.01(7), 6.01(8), 6.01(9) and 6.01(10) (but, in the case of Sections 6.01(7) and (8), with respect only to Significant Subsidiaries and Subsidiary Guarantors) and the limitation contained in Sections 5.01(a)(3) (“covenant defeasance option”). The Company may exercise its legal defeasance option notwithstanding its prior exercise of its covenant defeasance option.

If the Company exercises its legal defeasance option, payment of the Securities may not be accelerated because of an Event of Default with respect thereto. If the Company exercises its covenant defeasance option, payment of the Securities may not be accelerated because of an Event of Default specified in Sections 6.01(4), 6.01(6), 6.01(7), 6.01(8), 6.01(9) and 6.01(10) (but, in the case of Sections 6.01(7) and (8), with

respect only to Significant Subsidiaries and Subsidiary Guarantors) or because of the failure of the Company to comply with Section 5.01(a)(3). If the Company exercises its legal defeasance option or its covenant defeasance option, each Subsidiary Guarantor, if any, shall be released from all its obligations with respect to its Subsidiary Guaranty.

Upon satisfaction of the conditions set forth herein and upon request of the Company, the Trustee shall acknowledge in writing the discharge of those obligations that the Company terminates.

(b) Notwithstanding clauses (a) and (b) above, the Company’s obligations in Sections 2.03, 2.04, 2.05, 2.06, 2.07, 2.08, 7.07 and 7.08 and in this Article 8 shall survive until the Securities have been paid in full. Thereafter, the Company’s obligations in Sections 7.07 and 8.05 shall survive such payment.

SECTION 8.02 Conditions to Defeasance. The Company may exercise its legal defeasance option or its covenant defeasance option only if:

(1) the Company irrevocably deposits in trust with the Trustee money or U.S. Government Obligations for the payment of principal of and interest on the Securities to maturity or redemption, as the case may be;

(2) the Company delivers to the Trustee a certificate from a nationally recognized firm of independent accountants expressing their opinion that the payments of principal and interest when due and without reinvestment on the deposited U.S. Government Obligations plus any deposited money without investment will provide cash at such times and in such amounts as will be sufficient to pay principal and interest when due on all the Securities to maturity or redemption, as the case may be;

(3) 123 days pass after the deposit is made and during the 123-day period no Default specified in Sections 6.01(7) or (8) with respect to the Company occurs which is continuing at the end of the period;

(4) the deposit does not constitute a default under any other agreement binding on the Company;

(5) the Company delivers to the Trustee an Opinion of Counsel to the effect that the trust resulting from the deposit does not constitute, or is qualified as, a regulated investment company under the Investment Company Act of 1940;

(6) in the case of the legal defeasance option, the Company shall have delivered to the Trustee an Opinion of Counsel stating that (A) the Company has received from, or there has been published by, the Internal Revenue Service a ruling, or (B) since the date of this Indenture there has been a change in the applicable Federal income tax law, in either case to the effect that, and based thereon such Opinion of Counsel shall confirm that, the Securityholders will not recognize income, gain or loss for Federal income tax purposes as a result of such defeasance and will be subject to Federal income tax on the same amounts, in the

same manner and at the same times as would have been the case if such defeasance had not occurred;

(7) in the case of the covenant defeasance option, the Company shall have delivered to the Trustee an Opinion of Counsel to the effect that the Securityholders will not recognize income, gain or loss for Federal income tax purposes as a result of such covenant defeasance and will be subject to Federal income tax on the same amounts, in the same manner and at the same times as would have been the case if such covenant defeasance had not occurred; and

(8) the Company delivers to the Trustee (A) an Opinion of Counsel to the effect that Securityholders will not recognize income, gain or loss for U.S. Federal income tax purposes as a result of such deposit and defeasance and will be subject to U.S. Federal income tax on the same amounts and in the same manner and at the same times as would have been the case if such deposit and defeasance had not occurred (and, in the case of legal defeasance only, such Opinion of Counsel must be based on a ruling of the Internal Revenue Service or other change in applicable U.S. Federal income tax law) and (B) an Opinion of Counsel in the United Mexican States to the effect that Securityholders will not recognize income, gain or loss for income tax purposes of such jurisdiction as a result of such deposit and defeasance and will be subject to income tax of such jurisdiction on the same amounts and in the same manner and at the same times as would have been the case if such deposit and defeasance had not occurred; and

(9) the Company delivers to the Trustee an Officers’ Certificate and an Opinion of Counsel, each stating that all conditions precedent to the defeasance and discharge of the Securities as contemplated by this Article 8 have been complied with.

Before or after a deposit, the Company may make arrangements satisfactory to the Trustee for the redemption of Securities at a future date in accordance with Article 3.

SECTION 8.03 Application of Trust Money. The Trustee shall hold in trust money or U.S. Government Obligations deposited with it pursuant to this Article 8. It shall apply the deposited money and the money from U.S. Government Obligations through the Paying Agent and in accordance with this Indenture to the payment of principal of and interest on the Securities

SECTION 8.04 Repayment to Company. The Trustee and the Paying Agent shall promptly turn over to the Company upon request any excess money or securities held by them at any time.

Subject to any applicable abandoned property law, the Trustee and the Paying Agent shall pay to the Company upon request any money held by them for the payment of principal or interest that remains unclaimed for two years, and, thereafter,

Securityholders entitled to the money must look to the Company for payment as general creditors.

SECTION 8.05 Indemnity for Government Obligations. The Company shall pay and shall indemnify the Trustee against any tax, fee or other charge imposed on or assessed against deposited U.S. Government Obligations or the principal and interest received on such U.S. Government Obligations.

SECTION 8.06 Reinstatement. If the Trustee or Paying Agent is unable to apply any money or U.S. Government Obligations in accordance with this Article 8 by reason of any legal proceeding or by reason of any order or judgment of any court or governmental authority enjoining, restraining or otherwise prohibiting such application, the Company’s and each Subsidiary Guarantor’s obligations under this Indenture, each Subsidiary Guaranty and the Securities shall be revived and reinstated as though no deposit had occurred pursuant to this Article 8 until such time as the Trustee or Paying Agent is permitted to apply all such money or U.S. Government Obligations in accordance with this Article 8; provided, however, that, if the Company has made any payment of interest on or principal of any Securities because of the reinstatement of its obligations, the Company shall be subrogated to the rights of the Holders of such Securities to receive such payment from the money or U.S. Government Obligations held by the Trustee or Paying Agent.

Article 9

Amendments

SECTION 9.01 Without Consent of Holders. The Company, the Subsidiary Guarantors and the Trustee may amend this Indenture or the Securities without notice to or consent of any Securityholder:

(1) to cure any ambiguity, omission, defect or inconsistency;

(2) to comply with Article 5;

(3) to provide for uncertificated Securities in addition to or in place of certificated Securities; provided, however, that the uncertificated Securities are issued in registered form for purposes of Section 163(f) of the Code or in a manner such that the uncertificated Securities are described in Section 163(f)(2)(B) of the Code;

(4) to add Guarantees with respect to the Securities, including any Subsidiary Guaranties, or to secure the Securities;

(5) to add to the covenants of the Company or any Subsidiary Guarantor for the benefit of the Holders or to surrender any right or power herein conferred upon the Company or any Subsidiary Guarantor;

(6) to make any change that does not adversely affect the rights of any Securityholder; or

(7) to make any amendment to the provisions of this Indenture relating to the form, authentication, transfer and legending of Securities; provided, however, that (a) compliance with this Indenture as so amended would not result in Securities being transferred in violation of the Securities Act or any other applicable securities law and (b) such amendment does not materially affect the rights of Holders to transfer Securities.

After an amendment under this Section becomes effective, the Company shall mail to Securityholders a notice briefly describing such amendment. The failure to give such notice to all Securityholders, or any defect therein, shall not impair or affect the validity of an amendment under this Section.

SECTION 9.02 With Consent of Holders. The Company, the Subsidiary Guarantors and the Trustee may amend this Indenture or the Securities without notice to any Securityholder but with the written consent of the Holders of at least a majority in principal amount of the Securities then outstanding (including consents obtained in connection with a tender offer or exchange for the Securities). However, without the consent of each Securityholder affected thereby, an amendment or waiver may not:

(1) reduce the amount of Securities whose Holders must consent to an amendment;

(2) reduce the rate of or extend the time for payment of interest on any Security;

(3) reduce the principal of or change the Stated Maturity of any Security;

(4) change the provisions applicable to the redemption of any Security contained in Article 3;

(5) make any Security payable in money other than that stated in the Security;

(6) make any change in, the amendment provisions which require each Holder’s consent or in the waiver provisions;

(7) make any changes in the ranking or priority of any Security that would adversely affect the Securityholders;

(8) make any change in Section 6.04 or 6.07 or the second sentence of this Section;

(9) make any change in, or release other than in accordance with this Indenture, any Subsidiary Guaranty that would adversely affect the Securityholders; or

(10) make any change in Section 4.14 that adversely affects the rights of any Securityholder or amend the terms of the Securities or this Indenture in a way that would result in the loss of an exemption from any of the Taxes described therein.

It shall not be necessary for the consent of the Holders under this Section to approve the particular form of any proposed amendment, but it shall be sufficient if such consent approves the substance thereof.

SECTION 9.03 Compliance with Trust Indenture Act. Every amendment to this Indenture or the Securities shall comply with the TIA as then in effect.

SECTION 9.04 Revocation and Effect of Consents and Waivers. A consent to an amendment or a waiver by a Holder of a Security shall bind the Holder and every subsequent Holder of that Security or portion of the Security that evidences the same debt as the consenting Holder’s Security, even if notation of the consent or waiver is not made on the Security. However, any such Holder or subsequent Holder may revoke the consent or waiver as to such Holder’s Security or portion of the Security if the Trustee receives the notice of revocation before the date the amendment or waiver becomes effective. After an amendment or waiver becomes effective, it shall bind every Securityholder. An amendment or waiver becomes effective upon the execution of such amendment or waiver by the Trustee.

The Company may, but shall not be obligated to, fix a record date for the purpose of determining the Securityholders entitled to give their consent or take any other action described above or required or permitted to be taken pursuant to this Indenture. If a record date is fixed, then notwithstanding the immediately preceding paragraph, those Persons who were Securityholders at such record date (or their duly designated proxies), and only those Persons, shall be entitled to give such consent or to revoke any consent previously given or to take any such action, whether or not such Persons continue to be Holders after such record date. No such consent shall be valid or effective for more than 120 days after such record date.

SECTION 9.05 Notation on or Exchange of Securities. If an amendment changes the terms of a Security, the Trustee may require the Holder of the Security to deliver it to the Trustee. The Trustee may place an appropriate notation on the Security regarding the changed terms and return it to the Holder. Alternatively, if the

Company or the Trustee so determines, the Company in exchange for the Security shall issue and the Trustee shall authenticate a new Security that reflects the changed terms. Failure to make the appropriate notation or to issue a new Security shall not affect the validity of such amendment.

SECTION 9.06 Trustee To Sign Amendments. The Trustee shall sign any amendment authorized pursuant to this Article 9 if the amendment does not adversely affect the rights, duties, liabilities or immunities of the Trustee. If it does, the Trustee may but need not sign it. In signing such amendment the Trustee shall be entitled to receive indemnity reasonably satisfactory to it and shall be provided with, and (subject to Section 7.01) shall be fully protected in relying upon, an Officers’ Certificate and an Opinion of Counsel stating that such amendment is authorized or permitted by this Indenture.

SECTION 9.07 Payment for Consent. Neither the Company nor any Affiliate of the Company shall, directly or indirectly, pay or cause to be paid any consideration, whether by way of interest, fee or otherwise, to any Holder for or as an inducement to any consent, waiver or amendment of any of the terms or provisions of this Indenture or the Securities unless such consideration is offered to be paid to all Holders that so consent, waive or agree to amend in the time frame set forth in solicitation documents relating to such consent, waiver or agreement.

Article 10

Subsidiary Guarantees

SECTION 10.01 Guarantees. Each Subsidiary Guarantor hereby unconditionally and irrevocably guarantees, jointly and severally, to each Holder and to the Trustee and its successors and assigns (a) the full and punctual payment of principal of and interest on the Securities when due, whether at maturity, by acceleration, by redemption or otherwise, and all other monetary obligations of the Company under this Indenture and the Securities and (b) the full and punctual performance within applicable grace periods of all other obligations of the Company under this Indenture and the Securities (all the foregoing being hereinafter collectively called the “Obligations”). Each Subsidiary Guarantor further agrees that the Obligations may be extended or renewed, in whole or in part, without notice or further assent from such Subsidiary Guarantor and that such Subsidiary Guarantor will remain bound under this Article 10 notwithstanding any extension or renewal of any Obligation.

Each Subsidiary Guarantor waives presentation to, demand of, payment from and protest to the Company of any of the Obligations and also waives notice of protest for nonpayment. Each Subsidiary Guarantor waives notice of any default under the Securities or the Obligations. The obligations of each Subsidiary Guarantor hereunder shall not be affected by (1) the failure of any Holder or the Trustee to assert any claim or demand or to enforce any right or remedy against the Company or any other Person (including any Subsidiary Guarantor) under this Indenture, the Securities or any other agreement or otherwise; (2) any extension or renewal of any thereof; (3) any

rescission, waiver, amendment or modification of any of the terms or provisions of this Indenture, the Securities or any other agreement; (4) the release of any security held by any Holder or the Trustee for the Obligations or any of them; (5) the failure of any Holder or the Trustee to exercise any right or remedy against any other guarantor of the Obligations; or (6) except as set forth in Section 10.06, any change in the ownership of such Subsidiary Guarantor.

Each Subsidiary Guarantor further agrees that its Subsidiary Guaranty herein constitutes a guarantee of payment, performance and compliance when due (and not a guarantee of collection) and waives any right to require that any resort be had by any Holder or the Trustee to any security held for payment of the Obligations.

Each Subsidiary Guarantor hereby acknowledges that this Indenture and each Subsidiary Guaranty shall be governed by the laws of the State of New York and hereby expressly and irrevocably waives the benefit of “orden”, “excusión”, “division”, “quita”, “novación”, “espera”, “modificación” and all other rights provided for in Articles 2813, 2814, 2816, 2817, 2818, 2820, 2821, 2822, 2823, 2827, 2836, 2840, 2842, 2845, 2846, 2847, 2848 and 2849 of the Federal Civil Code (and the corresponding Articles under the Civil Codes in effect for each of the States of Mexico and the Federal District), which Articles are not reproduced herein inasmuch as each Subsidiary Guarantor hereby represents that it has read and is familiar with the contents thereof.

Except as expressly set forth in Sections 8.01(b), 10.02 and 10.06, the obligations of each Subsidiary Guarantor hereunder shall not be subject to any reduction, limitation, impairment or termination for any reason, including any claim of waiver, release, surrender, alteration or compromise, and shall not be subject to any defense of setoff, counterclaim, recoupment or termination whatsoever or by reason of the invalidity, illegality or unenforceability of the Obligations or otherwise. Without limiting the generality of the foregoing, the obligations of each Subsidiary Guarantor herein shall not be discharged or impaired or otherwise affected by the failure of any Holder or the Trustee to assert any claim or demand or to enforce any remedy under this Indenture, the Securities or any other agreement, by any waiver or modification of any thereof, by any default, failure or delay, willful or otherwise, in the performance of the obligations, or by any other act or thing or omission or delay to do any other act or thing which may or might in any manner or to any extent vary the risk of such Subsidiary Guarantor or would otherwise operate as a discharge of such Subsidiary Guarantor as a matter of law or equity.

Each Subsidiary Guarantor further agrees that its Guarantee herein shall continue to be effective or be reinstated, as the case may be, if at any time payment, or any part thereof, of principal of or interest on any Obligation is rescinded or must otherwise be restored by any Holder or the Trustee upon the bankruptcy or reorganization of the Company or otherwise.

In furtherance of the foregoing and not in limitation of any other right which any Holder or the Trustee has at law or in equity against any Subsidiary Guarantor by virtue hereof, upon the failure of the Company to pay the principal of or interest on

any Obligation when and as the same shall become due, whether at maturity, by acceleration, by redemption or otherwise, or to perform or comply with any other Obligation, each Subsidiary Guarantor hereby promises to and shall, upon receipt of written demand by the Trustee, forthwith pay, or cause to be paid, in cash, to the Holders or the Trustee an amount equal to the sum of (A) the unpaid amount of such Obligations, (B) accrued and unpaid interest on such Obligations (but only to the extent not prohibited by law) and (C) all other monetary Obligations of the Company to the Holders and the Trustee.

Each Subsidiary Guarantor agrees that, as between it, on the one hand, and the Holders and the Trustee, on the other hand, (i) the maturity of the Obligations Guaranteed hereby may be accelerated as provided in Article 6 for the purposes of such Subsidiary Guarantor’s Subsidiary Guaranty herein, notwithstanding any stay, injunction or other prohibition preventing such acceleration in respect of the Obligations guaranteed hereby, and (ii) in the event of any declaration of acceleration of such Obligations as provided in Article 6, such Obligations (whether or not due and payable) shall forthwith become due and payable by such Subsidiary Guarantor for the purposes of this Section.

Each Subsidiary Guarantor also agrees to pay any and all costs and expenses (including reasonable attorneys’ fees) incurred by the Trustee or any Holder in enforcing any rights under this Section.

SECTION 10.02 Limitation on Liability. Any term or provision of this Indenture to the contrary notwithstanding, the maximum aggregate amount of the Obligations guaranteed hereunder by any Subsidiary Guarantor shall not exceed the maximum amount that can be hereby guaranteed without rendering this Indenture, as it relates to such Subsidiary Guarantor, voidable under applicable law relating to fraudulent conveyance or fraudulent transfer or similar laws affecting the rights of creditors generally.

SECTION 10.03 Successors and Assigns. This Article 10 shall be binding upon each Subsidiary Guarantor and its successors and assigns and shall enure to the benefit of the successors and assigns of the Trustee and the Holders and, in the event of any transfer or assignment of rights by any Holder or the Trustee, the rights and privileges conferred upon that party in this Indenture and in the Securities shall automatically extend to and be vested in such transferee or assignee, all subject to the terms and conditions of this Indenture.

SECTION 10.04 No Waiver. Neither a failure nor a delay on the part of either the Trustee or the Holders in exercising any right, power or privilege under this Article 10 shall operate as a waiver thereof, nor shall a single or partial exercise thereof preclude any other or further exercise of any right, power or privilege. The rights, remedies and benefits of the Trustee and the Holders herein expressly specified are cumulative and not exclusive of any other rights, remedies or benefits which either may have under this Article 10 at law, in equity, by statute or otherwise.

SECTION 10.05

SECTION 10.06 Modification. No modification, amendment or waiver of any provision of this Article 10, nor the consent to any departure by any Subsidiary Guarantor therefrom, shall in any event be effective unless the same shall be in writing and signed by the Trustee, and then such waiver or consent shall be effective only in the specific instance and for the purpose for which given. No notice to or demand on any Subsidiary Guarantor in any case shall entitle such Subsidiary Guarantor to any other or further notice or demand in the same, similar or other circumstances.

SECTION 10.07 Release of Subsidiary Guarantor. A Subsidiary Guarantor shall be released from its obligations under this Article 10 (other than any obligation that shall have arisen under Section 10.07):

(1) upon the sale (including any sale pursuant to any exercise of remedies by a holder of Indebtedness of the Company or of such Subsidiary Guarantor) or other disposition (including by way of consolidation or merger) of a Subsidiary Guarantor;

(2) upon the sale or disposition of all or substantially all the assets of such Subsidiary Guarantor;

(3) upon the designation of such Subsidiary Guarantor as an Unrestricted Subsidiary in accordance with the terms of this Indenture;

(4) at such time as such Subsidiary Guarantor does not have any Indebtedness outstanding that would have required such Subsidiary Guarantor to enter into a Guaranty Agreement pursuant to Section 4.13, and the Company provides an Officer’s Certificate to the Trustee certifying that no such Indebtedness is outstanding and that the Company elects to have such Subsidiary Guarantor released; or

(5) upon defeasance of the Securities;

provided, however, that in the case of clauses (1) and (2) above, (i) such sale or other disposition is made to a Person other than the Company or an Affiliate and (ii) such sale or disposition is otherwise permitted by this Indenture. At the request of the Company, the Trustee shall execute and deliver an appropriate instrument evidencing such release.

SECTION 10.08 Contribution. Each Subsidiary Guarantor that makes a payment under its Subsidiary Guaranty shall be entitled upon payment in full of all guarantied obligations under this Indenture to a contribution from each other Subsidiary Guarantor in an amount equal to such other Subsidiary Guarantor’s prorata portion of such payment based on the respective net assets of all the Subsidiary Guarantors at the time of such payment determined in accordance with GAAP.

Article 11

Miscellaneous

SECTION 11.01 Trust Indenture Act Controls. If any provision of this Indenture limits, qualifies or conflicts with another provision which is required to be included in this Indenture by the TIA, the required provision shall control.

SECTION 11.02 Notices. Any notice or communication required to be delivered hereunder shall be in English and in writing and delivered in person or mailed by first-class mail addressed as follows:

if to the Company or any Subsidiary Guarantor:

▇▇▇▇▇, S.A.B. de C.V.

Blvd. ▇▇▇▇ ▇▇▇▇▇ km. 3.33 No. L-1

Col. Unidad San ▇▇▇▇▇

San ▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇, ▇.▇.

Mexico, CP 66215

Telephone: ▇▇▇ (▇▇) ▇▇▇▇-▇▇▇▇

Facsimile: ▇▇▇(▇▇) ▇▇▇▇-▇▇▇▇

Attention: Chief Financial Officer

with a copy to:

▇▇▇▇▇▇ ▇▇▇▇▇▇ & ▇▇▇▇▇▇▇ LLP

▇▇ ▇▇▇▇ ▇▇▇▇▇▇

New York, New York 10005

Telephone: (▇▇▇) ▇▇▇-▇▇▇▇

Facsimile: (▇▇▇) ▇▇▇-▇▇▇▇

Attention: ▇▇▇▇▇ ▇▇▇▇▇▇, Esq.

if to the Trustee:

The Bank of New York

▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇▇▇▇ ▇▇

New York, NY 10286

Telephone: (▇▇▇) ▇▇▇-▇▇▇▇

Facsimile: (▇▇▇) ▇▇▇-▇▇▇▇

Attention: Corporate Trust Administration – Global Finance Unit

The Company, any Subsidiary Guarantor or the Trustee by notice to the others may designate additional or different addresses for subsequent notices or communications.

Any notice or communication mailed to a Securityholder shall be mailed to the Securityholder at the Securityholder’s address as it appears on the registration books of the Registrar and shall be sufficiently given if so mailed within the time prescribed.

Failure to mail a notice or communication to a Securityholder or any defect in it shall not affect its sufficiency with respect to other Securityholders. If a notice or communication is mailed in the manner provided above, it is duly given, whether or not the addressee receives it; provided that any notice or communication delivered to the Trustee shall be deemed effective upon actual receipt thereof.

SECTION 11.03 Communication by Holders with Other Holders. Securityholders may communicate pursuant to TIA § 312(b) with other Securityholders with respect to their rights under this Indenture or the Securities. The Company, any Subsidiary Guarantor, the Trustee, the Registrar and anyone else shall have the protection of TIA § 312(c).

SECTION 11.04 Certificate and Opinion as to Conditions Precedent. Upon any request or application by the Company to the Trustee to take or refrain from taking any action under this Indenture, the Company shall furnish to the Trustee:

(1) an Officers’ Certificate in form and substance reasonably satisfactory to the Trustee stating that, in the opinion of the signers, all conditions precedent, if any, provided for in this Indenture relating to the proposed action have been complied with; and

(2) an Opinion of Counsel in form and substance reasonably satisfactory to the Trustee stating that, in the opinion of such counsel, all such conditions precedent have been complied with.

SECTION 11.05 Statements Required in Certificate or Opinion. Each certificate or opinion with respect to compliance with a covenant or condition provided for in this Indenture shall include:

(1) a statement that the individual making such certificate or opinion has read such covenant or condition;

(2) a brief statement as to the nature and scope of the examination or investigation upon which the statements or opinions contained in such certificate or opinion are based;

(3) a statement that, in the opinion of such individual, he or she has made such examination or investigation as is necessary to enable him or her to express an informed opinion as to whether or not such covenant or condition has been complied with; and

(4) a statement as to whether or not, in the opinion of such individual, such covenant or condition has been complied with.

SECTION 11.06 When Securities Disregarded. In determining whether the Holders of the required principal amount of Securities have concurred in any direction, waiver or consent, Securities owned by the Company or by any Person directly or indirectly controlling or controlled by or under direct or indirect common control with the Company shall be disregarded and deemed not to be outstanding, except that, for the purpose of determining whether the Trustee shall be protected in relying on any such direction, waiver or consent, only Securities which the Trustee knows are so owned shall be so disregarded. Also, subject to the foregoing, only Securities outstanding at the time shall be considered in any such determination.

SECTION 11.07 Rules by Trustee, Paying Agent and Registrar. The Trustee may make reasonable rules for action by or a meeting of Securityholders. The Registrar and the Paying Agent may make reasonable rules for their functions.

SECTION 11.08 Legal Holidays. If a payment date is a Legal Holiday, payment shall be made on the next succeeding day that is not a Legal Holiday, and no interest shall accrue for the intervening period. If a regular record date is a Legal Holiday, the record date shall not be affected.

SECTION 11.09 Force Majeure. In no event shall the Trustee be responsible or liable for any failure or delay in the performance of its obligations under this Indenture arising out of or caused by, directly or indirectly, forces beyond its reasonable control, including without limitation strikes, work stoppages, accidents, acts of war or terrorism, civil or military disturbances, nuclear or natural catastrophes or acts of god, and interruptions, loss or malfunctions of utilities, communications or computer (software or hardware) services.

SECTION 11.10 Governing Law. This Indenture and the Securities shall be governed by, and construed in accordance with, the laws of the State of New York.

SECTION 11.11 Consent to Jurisdiction; Appointment of Agent for Service of Process; Judgment Currency. (a) each of the Company and the Subsidiary Guarantors, by the execution and delivery of this Indenture, irrevocably agrees that service of process may be made upon CT Corporation System (“CT Corporation”), with offices at ▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇▇ ▇▇▇▇, ▇▇▇ ▇▇▇▇ ▇▇▇▇▇ (or its successors as agent for service of process), in the County, City and State of New York, United States of America, in any suit or proceeding against it instituted by the Trustee, based on or arising under this Indenture or the Securities and the transactions contemplated hereby in any federal or state court in the State of New York, County of New York, and each of the Company and the Subsidiary Guarantors hereby irrevocably consents and submits to the exclusive jurisdiction of, any such court and to the courts of its own corporate domicile in

respect of actions brought against it as a defendant generally and unconditionally in respect of any such suit or proceeding.

(b) each of the Company and the Subsidiary Guarantors further, by the execution and delivery of this Indenture, irrevocably designates, appoints and empowers CT Corporation, with offices at ▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇▇ ▇▇▇▇, ▇▇▇ ▇▇▇▇ ▇▇▇▇▇, as its designee, appointee and authorized agent to receive for and on its behalf service (i) of any and all legal process, summons, notices and documents that may be served in any action, suit or proceeding brought against it with respect to its obligations, liabilities or any other matter arising out of or in connection with this Indenture or the Securities and the transactions contemplated hereby and (ii) that may be made on such designee, appointee and authorized agent in accordance with legal procedures prescribed for such courts, and it being understood that the designation and appointment of CT Corporation as such authorized agent shall become effective immediately without any further action on its part. Each of the Company and the Subsidiary Guarantors represents to the Trustee that it has notified CT Corporation of such designation and appointment and that CT Corporation has accepted the same, and that CT Corporation has been paid its full fee for such designation, appointment and related services through the date that is one year from the date of this Indenture. Each of the Company and the Subsidiary Guarantors further agrees that, to the extent permitted by law, service of process upon CT Corporation (or its successors as agent for service of process) and written notice of said service to the Company or a Subsidiary Guarantor, as applicable, pursuant to Section 11.02 of this Indenture, shall be deemed in every respect effective service of process upon it in any such suit or proceeding. If for any reason such designee, appointee and agent hereunder shall cease to be available to act as such, each of the Company and the Subsidiary Guarantors agrees to designate a new designee, appointee and agent in The City of New York, New York on the terms and for the purposes of this Section reasonably satisfactory to the Trustee. Each of the Company and the Subsidiary Guarantors further hereby irrevocably consents and agrees to the service of any and all legal process, summons, notices and documents in any such action, suit or proceeding against the it by serving a copy thereof upon the relevant agent for service of process referred to in this Section (whether or not the appointment of such agent shall for any reason prove to be ineffective or such agent shall accept or acknowledge such service) and by mailing copies thereof by registered or certified air mail, postage prepaid, to the it at its address specified in or designated pursuant to this Indenture. Each of the Company and the Subsidiary Guarantors agrees that the failure of any such designee, appointee and agent to give any notice of such service to it shall not impair or affect in any way the validity of such service or any judgment rendered in any action or proceeding based thereon. Nothing herein shall in any way be deemed to limit the ability of the Trustee to serve any such legal process, summons, notices and documents in any other manner permitted by applicable law. Each of the Company and the Subsidiary Guarantors hereby irrevocably and unconditionally waives, to the fullest extent permitted by law, any objection that it may now or hereafter have to the laying of venue of any of the aforesaid actions, suits or proceedings arising out of or in connection with this Indenture brought in federal or state court in the State of New York, County of New York, and hereby further irrevocably and unconditionally waives and agrees not to plead or claim in any such court that any such

action, suit or proceeding brought in any such court has been brought in an inconvenient forum.

(c) If for the purposes of obtaining judgment in any court it is necessary to convert a sum due hereunder into any currency other than United States dollars, the parties hereto agree, to the fullest extent that they may effectively do so, that the rate of exchange used shall be the rate at which in accordance with normal banking procedures the Trustee could purchase United States dollars with the other currency in New York City on the business day preceding that on which final judgment is given. The obligation of any party hereto in respect of any sum due from it to the Trustee shall, notwithstanding any judgment in a currency other than United States dollars, not be discharged until the first business day, following receipt by the Trustee of any sum adjudged to be so due in the other currency, on which (and only to the extent that) the Trustee may in accordance with normal banking procedures purchase United States dollars with the other currency; if the United States dollars so purchased are less than the sum originally due to the Trustee hereunder, such party agrees, as a separate obligation and notwithstanding any such judgment, to indemnify the Trustee against the loss. If the United States dollars so purchased are greater than the sum originally due to the Trustee hereunder, the Trustee agrees to pay to such party an amount equal to the excess of the dollars so purchased over the sum originally due to the Trustee hereunder.

(d) To the extent that any of the Company or the Subsidiary Guarantors may acquire any immunity from jurisdiction of any court or from any legal process (whether through service of notice, attachment prior to judgment, attachment in aid of execution, execution or otherwise) with respect to itself or its property, it hereby irrevocably waives such immunity, to the fullest extent permitted by law.

(e) The provisions of this Section shall survive any termination of this Indenture, in whole or in part.

SECTION 11.12 WAIVER OF JURY TRIAL. EACH OF THE COMPANY, THE SUBSIDIARY GUARANTORS AND THE TRUSTEE HEREBY IRREVOCABLY WAIVES, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY AND ALL RIGHT TO TRIAL BY JURY IN ANY LEGAL PROCEEDING ARISING OUT OF OR RELATING TO THIS INDENTURE, THE SECURITIES OR THE TRANSACTIONS CONTEMPLATED HEREBY.

SECTION 11.13 No Recourse Against Others. A director, officer, employee or stockholder, as such, of the Company or any Subsidiary Guarantor shall not have any liability for any obligations of the Company under the Securities or this Indenture or of such Subsidiary Guarantor under its Subsidiary Guaranty or this Indenture or for any claim based on, in respect of or by reason of such obligations or their creation. By accepting a Security, each Securityholder shall waive and release all such liability. The waiver and release shall be part of the consideration for the issue of the Securities.

SECTION 11.14 Successors. All agreements of the Company in this Indenture and the Securities shall bind its successors. All agreements of the Subsidiary Guarantors shall bind their respective successors. All agreements of the Trustee in this Indenture shall bind its successors.

SECTION 11.15 Multiple Originals. The parties may sign any number of copies of this Indenture. Each signed copy shall be an original, but all of them together represent the same agreement. One signed copy is enough to prove this Indenture.

SECTION 11.16 Table of Contents; Headings. The table of contents, cross-reference sheet and headings of the Articles and Sections of this Indenture have been inserted for convenience of reference only, are not intended to be considered a part hereof and shall not modify or restrict any of the terms or provisions hereof.

IN WITNESS WHEREOF, the parties have caused this Indenture to be duly executed as of the date first written above.

▇▇▇▇▇, ▇.▇.▇. DE C.V.,
By

	Name:
	Title:

SERVICIOS AXTEL, S.A. DE C.V.,
By

	Name:
	Title:

IMPULSORA E INMOBILIARIA REGIONAL, S.A. DE C.V.,
By

	Name:
	Title:

INSTALACIONES Y CONTRATACIONES, S.A. DE C.V.,
By

	Name:
	Title:

AVANTEL, S. DE ▇.▇. DE C.V.,
By

	Name:
	Title:

AVANTEL INFRAESTRUCTURA S. DE ▇.▇. DE C.V.,
by

	Name:
	Title:

ADEQUIP, S.A.,
by

	Name:
	Title:

AVANTEL EQUIPOS, S.A. DE C.V.,
by

	Name:
	Title:

AVANTEL RECURSOS, S.A. DE C.V.,
by

	Name:
	Title:

AVANTEL SERVICIOS, S.A. DE C.V.,
by

	Name:
	Title:

AVANTEL TELECOMMUNICACIONES, S.A. DE C.V.,
by

	Name:
	Title:

TELECOM NETWORKS, INC.,
by

	Name:
	Title:

IN WITNESS WHEREOF, the parties have caused this Indenture to be duly executed as of the date first written above.

THE BANK OF NEW YORK,
By

	Name:
	Title:

SHAREHOLDERS

Blackstone Capital Partners III Merchant Banking Fund ▇.▇.

▇▇▇▇▇▇▇▇▇▇ Family Investment Partnership III L.P.

New Hampshire Insurance Company

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Citigroup, Inc.

PROVISIONS RELATING TO SECURITIES

1. Definitions

1.1 Definitions

For the purposes of this Appendix the following terms shall have the meanings indicated below:

“Applicable Procedures” means, with respect to any transfer or transaction involving a Temporary Regulation S Global Security or beneficial interest therein, the rules and procedures of the Depository for such a Temporary Regulation S Global Security, to the extent applicable to such transaction and as in effect from time to time.

“Definitive Security” means a certificated Security bearing, if required, the appropriate restricted securities legend set forth in Section 2.3(e).

“Depository” means The Depository Trust Company, its nominees and their respective successors.

“Distribution Compliance Period”, with respect to any Securities, means the period of 40 consecutive days beginning on and including the later of (i) the day on which such Securities are first offered to Persons other than distributors (as defined in Regulation S under the Securities Act) in reliance on Regulation S and (ii) the issue date with respect to such Securities.

“IAI” means an institutional “accredited investor,” as defined in Rule 501(a) (1), (2), (3) or (7) of Regulation D under the Securities Act.

“Initial Purchaser” means (1) with respect to the Securities issued on the Issue Date, Credit Suisse Securities (USA) LLC, and (2) with respect to each issuance of Additional Securities, the Persons purchasing such Additional Securities under the related Purchase Agreement.

“Purchase Agreement” means (1) with respect to the Securities issued on the Issue Date, the Purchase Agreement dated January 30, 2007, among the Company, the Subsidiary Guarantors and the Initial Purchaser, and (2) with respect to each issuance of Additional Securities, the purchase agreement or underwriting agreement among the Company, the Subsidiary Guarantors and the Persons purchasing such Additional Securities.

“QIB” means a “qualified institutional buyer” as defined in Rule 144A.

“Rule 144A Securities” means all Securities offered and sold to QIBs in reliance on Rule 144A.

“Securities” means (1) US$275,000,000 aggregate principal amount of 7⅝% Senior Unsecured Notes Due 2017 issued on the Issue Date and (2) Additional

Securities, if any, issued in a transaction exempt from the registration requirements of the Securities Act.

“Securities Act” means the Securities Act of 1933.

“Securities Custodian” means the custodian with respect to a Global Security (as appointed by the Depository), or any successor Person thereto and shall initially be the Trustee.

“Transfer Restricted Securities” means Securities that bear or are required to bear the legend set forth in Section 2.3(b) hereto.

1.2 Other Definitions

Term	Defined in Section:
Agent Members	2.1(b)
Global Securities	2.1(a)
IAI Global Security	2.1(a)
Permanent Regulation S Global Security	2.1(a)
Regulation S	2.1(a)
Regulation S Global Security	2.1(a)
Rule 144A	2.1(a)
Rule 144A Global Security	2.1(a)
Temporary Regulation S Global Security	2.1(a)

2. The Securities.

2.1 (a) Form and Dating. The Securities will be offered and sold by the Company pursuant to a Purchase Agreement. The Securities will be resold initially only to (i) QIBs in reliance on Rule 144A under the Securities Act (“Rule 144A”) and (ii) Persons other than U.S. Persons (as defined in Regulation S) in reliance on Regulation S under the Securities Act (“Regulation S”). Securities may thereafter be transferred to, among others, QIBs, IAIs and purchasers in reliance on Regulation S, subject to the restrictions on transfer set forth herein. Securities initially resold pursuant to Rule 144A shall be issued in the form of one or more permanent global Securities in definitive, fully registered form without interest coupons (collectively, the “Rule 144A Global Security”); and Securities initially resold to IAIs shall be issued in the form of one or more permanent global Securities in definitive, fully registered form without interest coupons (collectively, the “IAI Global Security”); and Securities initially resold pursuant to Regulation S shall be issued initially in the form of one or more temporary global securities in fully registered form (collectively, the “Temporary Regulation S Global Security”), in each case without interest coupons and with the global securities legend and the applicable restricted securities legend set forth in Exhibit 1 hereto, which shall be deposited on behalf of the purchasers of the Securities represented thereby with the Securities Custodian and registered in the name of the Depository or a nominee of the Depository, duly executed by the Company and authenticated by the Trustee as provided

in this Indenture. Except as set forth in this Section 2.1(a), beneficial ownership interests in the Temporary Regulation S Global Security will not be exchangeable for interests in the Rule 144A Global Security, the IAI Global Security, a permanent global security (the “Permanent Regulation S Global Security” and together with the Temporary Regulation S Global Security, the “Regulation S Global Security” or any other Security prior to the expiration of the Distribution Compliance Period and then, after the expiration of the Distribution Compliance Period, may be exchanged for interests in a Rule 144A Global Security or an IAI Global Security only upon certification in form reasonably satisfactory to the Trustee that (i) beneficial ownership interests in such Temporary Regulation S Global Security are owned either by non-U.S. persons or U.S. persons who purchased such interests in a transaction that did not require registration under the Securities Act and (ii) in the case of an exchange for an IAI Global Security, certification that the interest in the Temporary Regulation S Global Security is being transferred to an institutional “accredited investor” under the Securities Act that is an institutional accredited investor acquiring the securities for its own account or for the account of an institutional accredited investor.

Beneficial interests in Temporary Regulation S Global Securities or IAI Global Securities may be exchanged for interests in Rule 144A Global Securities if (1) such exchange occurs in connection with a transfer of Securities in compliance with Rule 144A and (2) the transferor of the beneficial interest in the Temporary Regulation S Global Security or the IAI Global Security, as applicable, first delivers to the Trustee a written certificate (in a form satisfactory to the Trustee) to the effect that the beneficial interest in the Temporary Regulation S Global Security or the IAI Global Security, as applicable, is being transferred to a Person (a) who the transferor reasonably believes to be a QIB, (b) purchasing for its own account or the account of a QIB in a transaction meeting the requirements of Rule 144A, and (c) in accordance with all applicable securities laws of the States of the United States and other jurisdictions.

Beneficial interests in Temporary Regulation S Global Securities and Rule 144A Global Securities may be exchanged for an interest in IAI Global Securities if (1) such exchange occurs in connection with a transfer of the securities in compliance with an exemption under the Securities Act and (2) the transferor of the Regulation S Global Security or Rule 144A Global Security, as applicable, first delivers to the Trustee a written certificate (substantially in the form of Exhibit 2) to the effect that (A) the Regulation S Global Security or Rule 144A Global Security, as applicable, is being transferred (a) to an “accredited investor” within the meaning of 501(a) (1), (2), (3) or (7) under the Securities Act that is an institutional investor acquiring the securities for its own account or for the account of such an institutional accredited investor, in each case in a minimum principal amount of Securities of US$250,000, for investment purposes and not with a view to or for offer or sale in connection with any distribution in violation of the Securities Act and (B) in accordance with all applicable securities laws of the States of the United States and other jurisdictions.

Beneficial interests in a Rule 144A Global Security or an IAI Global Security may be transferred to a Person who takes delivery in the form of an interest in a Regulation S Global Security, whether before or after the expiration of the Distribution

Compliance Period, only if the transferor first delivers to the Trustee a written certificate (in the form provided in the Indenture) to the effect that such transfer is being made in accordance with Rule 903 or 904 of Regulation S or Rule 144 (if applicable).

The Rule 144A Global Security, the IAI Global Security, the Temporary Regulation S Global Security and the Permanent Regulation S Global Security are collectively referred to herein as “Global Securities”. The aggregate principal amount of the Global Securities may from time to time be increased or decreased by adjustments made on the records of the Trustee and the Depository or its nominee as hereinafter provided.

(b) Book-Entry Provisions. This Section 2.1(b) shall apply only to a Global Security deposited with or on behalf of the Depository.

The Company shall execute and the Trustee shall, in accordance with this Section 2.1(b), authenticate and deliver initially one or more Global Securities that (a) shall be registered in the name of the Depository for such Global Security or Global Securities or the nominee of such Depository and (b) shall be delivered by the Trustee to such Depository or pursuant to such Depository’s instructions or held by the Trustee as custodian for the Depository.

Members of, or participants in, the Depository (“Agent Members”) shall have no rights under this Indenture with respect to any Global Security held on their behalf by the Depository or by the Trustee as the custodian of the Depository or under such Global Security, and the Company, the Trustee and any agent of the Company or the Trustee shall be entitled to treat the Depository as the absolute owner of such Global Security for all purposes whatsoever. Notwithstanding the foregoing, nothing herein shall prevent the Company, the Trustee or any agent of the Company or the Trustee from giving effect to any written certification, proxy or other authorization furnished by the Depository or impair, as between the Depository and its Agent Members, the operation of customary practices of such Depository governing the exercise of the rights of a holder of a beneficial interest in any Global Security.

(c) Definitive Securities. Except as provided in this Section 2.1 or Section 2.3 or 2.4, owners of beneficial interests in Restricted Global Securities shall not be entitled to receive physical delivery of Definitive Securities.

2.2 Authentication. The Trustee shall authenticate and deliver: (1) on the Issue Date, an aggregate principal amount of US$275,000,000 7⅝% Senior Unsecured Notes Due 2017 and (2) any Additional Securities for an original issue in an aggregate principal amount specified in the written order of the Company pursuant to Section 2.02 of the Indenture. Such order shall specify the amount of the Securities to be authenticated and the date on which the original issue of Securities is to be authenticated and, in the case of any issuance of Additional Securities pursuant to Section 2.13 of the Indenture, shall certify that such issuance is in compliance with Section 4.03 of the Indenture.

2.3 Transfer and Exchange.

(a) Transfer and Exchange of Definitive Securities. When Definitive Securities are presented to the Registrar with a request:

(x)

to register the transfer of such Definitive Securities; or

(y)

to exchange such Definitive Securities for an equal principal amount of Definitive Securities of other authorized denominations,

the Registrar shall register the transfer or make the exchange as requested if its reasonable requirements for such transaction are met; provided, however, that the Definitive Securities surrendered for transfer or exchange:

(i) shall be duly endorsed or accompanied by a written instrument of transfer in form reasonably satisfactory to the Company and the Registrar, duly executed by the Holder thereof or its attorney duly authorized in writing; and

(ii) if such Definitive Securities are required to bear a restricted securities legend, they are being transferred or exchanged pursuant to an effective registration statement under the Securities Act, pursuant to Section 2.3(b) or pursuant to clause (A), (B) or (C) below, and are accompanied by the following additional information and documents, as applicable:

(A) if such Definitive Securities are being delivered to the Registrar by a Holder for registration in the name of such Holder, without transfer, a certification from such Holder to that effect; or

(B) if such Definitive Securities are being transferred to the Company, a certification to that effect; or

(C) if such Definitive Securities are being transferred (x) pursuant to an exemption from registration in accordance with Rule 144A, Regulation S or Rule 144 under the Securities Act; or (y) in reliance upon another exemption from the requirements of the Securities Act: (i) a certification to that effect (in the form set forth on the reverse of the Security) and (ii) if the Company so requests, an opinion of counsel or other evidence reasonably satisfactory to it as to the compliance with the restrictions set forth in the legend set forth in Section 2.3(e)(i).

(b) Restrictions on Transfer of a Definitive Security for a Beneficial Interest in a Global Security. A Definitive Security may not be exchanged for a beneficial interest in a Rule 144A Global Security, an IAI Global Security or a Permanent

Regulation S Global Security except upon satisfaction of the requirements set forth below. Upon receipt by the Trustee of a Definitive Security, duly endorsed or accompanied by appropriate instruments of transfer, in form satisfactory to the Trustee, together with:

(i) certification, in the form set forth on the reverse of the Security, that such Definitive Security is either (A) being transferred to a QIB in accordance with Rule 144A, (B) being transferred to an IAI or (C) being transferred after expiration of the Distribution Compliance Period by a Person who initially purchased such Security in reliance on Regulation S to a buyer who elects to hold its interest in such Security in the form of a beneficial interest in the Permanent Regulation S Global Security; and

(ii) written instructions directing the Trustee to make, or to direct the Securities Custodian to make, an adjustment on its books and records with respect to such Rule 144A Global Security (in the case of a transfer pursuant to clause (b)(i)(A)), IAI Global Security (in the case of a transfer pursuant to clause (b)(1)(B)) or Permanent Regulation S Global Security (in the case of a transfer pursuant to clause (b)(i)(C)) to reflect an increase in the aggregate principal amount of the Securities represented by the Rule 144A Global Security, IAI Global Security or Permanent Regulation S Global Security, as applicable, such instructions to contain information regarding the Depository account to be credited with such increase,

then the Trustee shall cancel such Definitive Security and cause, or direct the Securities Custodian to cause, in accordance with the standing instructions and procedures existing between the Depository and the Securities Custodian, the aggregate principal amount of Securities represented by the Rule 144A Global Security, IAI Global Security or Permanent Regulation S Global Security, as applicable, to be increased by the aggregate principal amount of the Definitive Security to be exchanged and shall credit or cause to be credited to the account of the Person specified in such instructions a beneficial interest in the Rule 144A Global Security, IAI Global Security or Permanent Regulation S Global Security, as applicable, equal to the principal amount of the Definitive Security so canceled. If no Rule 144A Global Securities, IAI Global Securities or Permanent Regulation S Global Securities, as applicable, are then outstanding, the Company shall issue and the Trustee shall authenticate, upon written order of the Company in the form of an Officers’ Certificate of the Company, a new Rule 144A Global Security, IAI Global Security or Permanent Regulation S Global Security, as applicable, in the appropriate principal amount.

(i) The transfer and exchange of Global Securities or beneficial interests therein shall be effected through the Depository, in accordance with this Indenture (including applicable restrictions on transfer set forth herein, if any) and the procedures of the Depository therefor. A transferor of a beneficial interest in

a Global Security shall deliver to the Registrar a written order given in accordance with the Depository’s procedures containing information regarding the participant account of the Depository to be credited with a beneficial interest in the Global Security. The Registrar shall, in accordance with such instructions, instruct the Depository to credit to the account of the Person specified in such instructions a beneficial interest in the Global Security and to debit the account of the Person making the transfer the beneficial interest in the Global Security being transferred.

(ii) If the proposed transfer is a transfer of a beneficial interest in one Global Security to a beneficial interest in another Global Security, the Registrar shall reflect on its books and records the date and an increase in the principal amount of the Global Security to which such interest is being transferred in an amount equal to the principal amount of the interest to be so transferred, and the Registrar shall reflect on its books and records the date and a corresponding decrease in the principal amount of the Global Security from which such interest is being transferred.

(iii) Notwithstanding any other provisions of this Appendix (other than the provisions set forth in Section 2.4), a Global Security may not be transferred as a whole except by the Depository to a nominee of the Depository or by a nominee of the Depository to the Depository or another nominee of the Depository or by the Depository or any such nominee to a successor Depository or a nominee of such successor Depository.

(iv) In the event that a Global Security is exchanged for Definitive Securities pursuant to Section 2.4 of this Appendix, such Securities may be exchanged only in accordance with such procedures as are substantially consistent with the provisions of this Section 2.3 (including the certification requirements set forth on the reverse of the Securities intended to ensure that such transfers comply with Rule 144A, Regulation S or another applicable exemption under the Securities Act, as the case may be) and such other procedures as may from time to time be adopted by the Company.

(d) Restrictions on Transfer of Temporary Regulation S Global Securities. During the Distribution Compliance Period, beneficial ownership interests in Temporary Regulation S Global Securities may only be sold, pledged or transferred in accordance with the Applicable Procedures and only (i) to the Company, (ii) in an offshore transaction in accordance with Regulation S (other than a transaction resulting in an exchange for an interest in a Permanent Regulation S Global Security) or (iii) pursuant to an effective registration statement under the Securities Act, in each case in accordance with any applicable securities laws of any State of the United States.

(e) Legend.

(i) Except as permitted by the following paragraphs (ii), (iii) and (iv), each Security certificate evidencing the Global Securities (and all Securities issued in exchange therefor or in substitution thereof), in the case of Securities offered otherwise than in reliance on Regulation S, shall bear a legend in substantially the following form:

THIS SECURITY (OR ITS PREDECESSOR) WAS ORIGINALLY ISSUED IN A TRANSACTION EXEMPT FROM REGISTRATION UNDER THE UNITED STATES SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), AND THIS SECURITY MAY NOT BE OFFERED, SOLD OR OTHERWISE TRANSFERRED IN THE ABSENCE OF SUCH REGISTRATION OR AN APPLICABLE EXEMPTION THEREFROM. EACH PURCHASER OF THIS SECURITY IS HEREBY NOTIFIED THAT THE SELLER OF THIS SECURITY MAY BE RELYING ON THE EXEMPTION FROM THE PROVISIONS OF SECTION 5 OF THE SECURITIES ACT PROVIDED BY RULE 144A THEREUNDER.

THE HOLDER OF THIS SECURITY AGREES FOR THE BENEFIT OF THE COMPANY THAT (A) THIS SECURITY MAY BE OFFERED, RESOLD, PLEDGED OR OTHERWISE TRANSFERRED, ONLY (I) TO THE COMPANY, (II) IN THE UNITED STATES TO A PERSON WHOM THE SELLER REASONABLY BELIEVES IS A QUALIFIED INSTITUTIONAL BUYER (AS DEFINED IN RULE 144A UNDER THE SECURITIES ACT) IN A TRANSACTION MEETING THE REQUIREMENTS OF RULE 144A, (III) TO AN “ACCREDITED INVESTOR” WITHIN THE MEANING OF RULE 501(A)(1), (2), (3), OR (7) OF REGULATION D UNDER THE SECURITIES ACT THAT IS AN INSTITUTIONAL INVESTOR ACQUIRING THE SECURITIES FOR ITS OWN ACCOUNT OR FOR THE ACCOUNT OF SUCH AN INSTITUTIONAL ACCREDITED INVESTOR, IN EACH CASE IN A MINIMUM PRINCIPAL AMOUNT OF SECURITIES OF US$250,000, FOR INVESTMENT PURPOSES AND NOT WITH A VIEW TO OR FOR OFFER OR SALE IN CONNECTION WITH ANY DISTRIBUTION IN VIOLATION OF THE SECURITIES ACT, (IV) OUTSIDE THE UNITED STATES IN AN OFFSHORE TRANSACTION IN ACCORDANCE WITH RULE 904 UNDER THE SECURITIES ACT, (V) PURSUANT TO EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT PROVIDED BY RULE 144 THEREUNDER (IF AVAILABLE) OR (VI) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT, IN EACH OF CASES (I) THROUGH (VI), IN ACCORDANCE WITH ANY APPLICABLE SECURITIES LAWS OF ANY STATE OF THE UNITED STATES, AND (B) THE HOLDER

WILL, AND EACH SUBSEQUENT HOLDER IS REQUIRED TO, NOTIFY ANY PURCHASER OF THIS SECURITY FROM IT OF THE RESALE RESTRICTIONS REFERRED TO IN (A) ABOVE.

Each certificate evidencing a Security offered in reliance on Regulation S shall, in addition to the foregoing, bear a legend in substantially the following form:

THIS SECURITY (OR ITS PREDECESSOR) WAS ORIGINALLY ISSUED IN A TRANSACTION ORIGINALLY EXEMPT FROM REGISTRATION UNDER THE U.S. SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), AND MAY NOT BE TRANSFERRED IN THE UNITED STATES OR TO, OR FOR THE ACCOUNT OR BENEFIT OF, ANY U.S. PERSON EXCEPT PURSUANT TO AN AVAILABLE EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT AND ALL APPLICABLE STATE SECURITIES LAWS. TERMS USED ABOVE HAVE THE MEANINGS GIVEN TO THEM IN REGULATION S UNDER THE SECURITIES ACT.

Each Definitive Security shall also bear the following additional legend:

IN CONNECTION WITH ANY TRANSFER, THE HOLDER WILL DELIVER TO THE REGISTRAR AND TRANSFER AGENT SUCH CERTIFICATES AND OTHER INFORMATION AS SUCH TRANSFER AGENT MAY REASONABLY REQUIRE TO CONFIRM THAT THE TRANSFER COMPLIES WITH THE FOREGOING RESTRICTIONS.

(ii) Upon any sale or transfer of a Transfer Restricted Security (including any Transfer Restricted Security represented by a Global Security) pursuant to Rule 144 under the Securities Act, the Registrar shall permit the transferee thereof to exchange such Transfer Restricted Security for a certificated Security that does not bear the legend set forth above and rescind any restriction on the transfer of such Transfer Restricted Security, if the transferor thereof certifies in writing to the Registrar that such sale or transfer was made in reliance on Rule 144 (such certification to be in the form set forth on the reverse of the Security).

(f) Cancellation or Adjustment of Global Security. At such time as all beneficial interests in a Global Security have either been exchanged for Definitive Securities, redeemed, purchased or canceled, such Global Security shall be returned to the Depository for cancellation or retained and canceled by the Trustee. At any time prior to such cancellation, if any beneficial interest in a Global Security is exchanged for Definitive Securities, redeemed, purchased or canceled, the principal amount of Securities represented by such Global Security shall be reduced and an adjustment shall be made on the books and records of the Trustee (if it is then the Securities Custodian for

such Global Security) with respect to such Global Security, by the Trustee or the Securities Custodian, to reflect such reduction.

(g) No Obligation of the Trustee.

(i) The Trustee shall have no responsibility or obligation to any beneficial owner of a Global Security, a member of, or a participant in the Depository or other Person with respect to the accuracy of the records of the Depository or its nominee or of any participant or member thereof, with respect to any ownership interest in the Securities or with respect to the delivery to any participant, member, beneficial owner or other Person (other than the Depository) of any notice (including any notice of redemption) or the payment of any amount, under or with respect to such Securities. All notices and communications to be given to the Holders and all payments to be made to Holders under the Securities shall be given or made only to or upon the order of the registered Holders (which shall be the Depository or its nominee in the case of a Global Security). The rights of beneficial owners in any Global Security shall be exercised only through the Depository subject to the applicable rules and procedures of the Depository. The Trustee may rely and shall be fully protected in relying upon information furnished by the Depository with respect to its members, participants and any beneficial owners.

(ii) The Trustee shall have no obligation or duty to monitor, determine or inquire as to compliance with any restrictions on transfer imposed under this Indenture or under applicable law with respect to any transfer of any interest in any Security (including any transfers between or among Depository participants, members or beneficial owners in any Global Security) other than to require delivery of such certificates and other documentation or evidence as are expressly required by, and to do so if and when expressly required by, the terms of this Indenture, and to examine the same to determine substantial compliance as to form with the express requirements hereof.

2.4 Certificated Securities.

(a) A Global Security deposited with the Depository or with the Trustee as Securities Custodian for the Depository pursuant to Section 2.1 shall be transferred to the beneficial owners thereof in the form of Definitive Securities in an aggregate principal amount equal to the principal amount of such Global Security, in exchange for such Global Security, only if such transfer complies with Section 2.3 hereof and (i) the Depository notifies the Company that it is unwilling or unable to continue as Depository for such Global Security and the Depository fails to appoint a successor depository or if at any time such Depository ceases to be a “clearing agency” registered under the Exchange Act and, in either case, a successor depositary is not appointed by the Company within 90 days of such notice or (ii) an Event of Default has occurred and is continuing.

(b) Any Global Security that is transferable to the beneficial owners thereof pursuant to this Section 2.4 shall be surrendered by the Depository to the Trustee located at its principal corporate trust office in the Borough of Manhattan, The City of New York, to be so transferred, in whole or from time to time in part, without charge, and the Trustee shall authenticate and deliver, upon such transfer of each portion of such Global Security, an equal aggregate principal amount of Definitive Securities of authorized denominations. Any portion of a Global Security transferred pursuant to this Section 2.4 shall be executed, authenticated and delivered only in denominations of US$2,000 principal amount or any integral multiple of US$1,000 in excess thereof and registered in such names as the Depository shall direct. Any Definitive Security delivered in exchange for an interest in the Transfer Restricted Security shall, except as otherwise provided by Section 2.3(e) hereof, bear the applicable restricted securities legend and definitive note legend set forth in Exhibit 1 hereto.

(c) Subject to the provisions of Section 2.4(b) hereof, the registered Holder of a Global Security shall be entitled to grant proxies and otherwise authorize any Person, including Agent Members and Persons that may hold interests through Agent Members, to take any action which a Holder is entitled to take under this Indenture or the Securities.

(d) In the event of the occurrence of one of the events specified in Section 2.4(a) hereof, the Company shall promptly make available to the Trustee a reasonable supply of Definitive Securities in definitive, fully registered form without interest coupons. In the event that the Definitive Securities are not issued to each such beneficial owner promptly after the Registrar has received a request from the Holder of a Global Security to issue such Certificated Security, the Company expressly acknowledges, with respect to the right of any Holder to pursue a remedy pursuant to Article 6 of the Indenture, the right of any beneficial holder of Securities to pursue such remedy with respect to the portion of the Global Security that represents such beneficial holder’s Securities as if such Certificated Securities had been issued.

[FORM OF FACE OF INITIAL SECURITY]

[Global Securities Legend]

UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION (“DTC”), NEW YORK, NEW YORK, TO THE COMPANY OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE TO CEDE & CO., OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC) ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

TRANSFERS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS IN WHOLE, BUT NOT IN PART, TO NOMINEES OF DTC OR TO A SUCCESSOR THEREOF OR SUCH SUCCESSOR’S NOMINEE AND TRANSFERS OF PORTIONS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS MADE IN ACCORDANCE WITH THE RESTRICTIONS SET FORTH IN THE INDENTURE REFERRED TO ON THE REVERSE HEREOF.

[[FOR REGULATION S GLOBAL SECURITY ONLY] UNTIL 40 DAYS AFTER THE LATER OF COMMENCEMENT OR COMPLETION OF THE OFFERING, AN OFFER OR SALE OF SECURITIES WITHIN THE UNITED STATES BY A DEALER (AS DEFINED IN THE SECURITIES ACT) MAY VIOLATE THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT IF SUCH OFFER OR SALE IS MADE OTHERWISE THAN IN ACCORDANCE WITH RULE 144A THEREUNDER.]

[Restricted Securities Legend for Securities Offered

Otherwise than in Reliance on Regulation S]

THE HOLDER OF THIS SECURITY AGREES FOR THE BENEFIT OF THE COMPANY THAT (A) THIS SECURITY MAY BE OFFERED, RESOLD, PLEDGED OR OTHERWISE TRANSFERRED, ONLY (I) TO THE COMPANY, (II) WITHIN THE UNITED STATES TO A PERSON WHOM THE SELLER REASONABLY BELIEVES IS A QUALIFIED INSTITUTIONAL BUYER (AS DEFINED IN RULE 144A UNDER THE SECURITIES ACT) IN A TRANSACTION MEETING THE REQUIREMENTS OF RULE 144A, (III) TO AN “ACCREDITED INVESTOR” WITHIN THE MEANING OF RULE 501(A)(1),(2),(3) OR (7) OF REGULATION D UNDER THE SECURITIES ACT THAT IS AN INSTITUTIONAL INVESTOR ACQUIRING THE SECURITIES FOR ITS OWN ACCOUNT OR FOR THE ACCOUNT OF SUCH AN INSTITUTIONAL ACCREDITED INVESTOR, IN EACH CASE IN A MINIMUM PRINCIPAL AMOUNT OF SECURITIES OF US$250,000, FOR INVESTMENT PURPOSES AND NOT WITH A VIEW TO OR FOR OFFER OR SALE IN CONNECTION WITH ANY DISTRIBUTION IN VIOLATION OF THE SECURITIES ACT, (IV) OUTSIDE THE UNITED STATES IN AN OFFSHORE TRANSACTION IN ACCORDANCE WITH RULE 904 UNDER THE SECURITIES ACT, (V) PURSUANT TO AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT PROVIDED BY RULE 144 THEREUNDER (IF AVAILABLE) OR (VI) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT, IN EACH OF CASES (I) THROUGH (VI) IN ACCORDANCE WITH ANY APPLICABLE SECURITIES LAWS OF ANY STATE OF THE UNITED STATES, AND (B) THE HOLDER WILL, AND EACH SUBSEQUENT HOLDER IS REQUIRED TO, NOTIFY ANY PURCHASER OF THIS SECURITY FROM IT OF THE RESALE RESTRICTIONS REFERRED TO IN (A) ABOVE.

[Restricted Securities Legend for Securities Offered in Reliance on Regulation S.]

[Temporary Regulation S Global Security Legend]

EXCEPT AS SET FORTH BELOW, BENEFICIAL OWNERSHIP INTERESTS IN THIS TEMPORARY REGULATION S GLOBAL SECURITY WILL NOT BE EXCHANGEABLE FOR INTERESTS IN THE PERMANENT REGULATION S GLOBAL SECURITY OR ANY OTHER SECURITY REPRESENTING AN INTEREST IN THE SECURITIES REPRESENTED HEREBY

WHICH DO NOT CONTAIN A LEGEND CONTAINING RESTRICTIONS ON TRANSFER, UNTIL THE EXPIRATION OF THE “40-DAY DISTRIBUTION COMPLIANCE PERIOD” (WITHIN THE MEANING OF RULE 903(b)(2) OF REGULATION S UNDER THE SECURITIES ACT) AND THEN ONLY UPON CERTIFICATION IN FORM REASONABLY SATISFACTORY TO THE TRUSTEE THAT SUCH BENEFICIAL INTERESTS ARE OWNED EITHER BY NON-U.S. PERSONS OR U.S. PERSONS WHO PURCHASED SUCH INTERESTS IN A TRANSACTION THAT DID NOT REQUIRE REGISTRATION UNDER THE SECURITIES ACT. DURING SUCH 40-DAY DISTRIBUTION COMPLIANCE PERIOD, BENEFICIAL OWNERSHIP INTERESTS IN THIS TEMPORARY REGULATION S GLOBAL SECURITY MAY ONLY BE SOLD, PLEDGED OR TRANSFERRED (I) TO THE COMPANY, (II) OUTSIDE THE UNITED STATES IN A TRANSACTION IN ACCORDANCE WITH RULE 904 OF REGULATION S UNDER THE SECURITIES ACT, OR (III) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT, IN EACH OF CASES (I) THROUGH (III) IN ACCORDANCE WITH ANY APPLICABLE SECURITIES LAWS OF ANY STATE OF THE UNITED STATES. HOLDERS OF INTERESTS IN THIS TEMPORARY REGULATION S GLOBAL SECURITY WILL NOTIFY ANY PURCHASER OF THIS SECURITY OF THE RESALE RESTRICTIONS REFERRED TO ABOVE, IF THEN APPLICABLE.

AFTER THE EXPIRATION OF THE DISTRIBUTION COMPLIANCE PERIOD, BENEFICIAL INTERESTS IN THIS TEMPORARY REGULATION S GLOBAL SECURITY MAY BE EXCHANGED FOR INTERESTS IN A RULE 144A GLOBAL SECURITY ONLY IF (1) SUCH EXCHANGE OCCURS IN CONNECTION WITH A TRANSFER OF THE SECURITIES IN COMPLIANCE WITH RULE 144A AND (2) THE TRANSFEROR OF THE REGULATION S GLOBAL SECURITY FIRST DELIVERS TO THE TRUSTEE A WRITTEN CERTIFICATE (IN THE FORM ATTACHED TO THIS CERTIFICATE) TO THE EFFECT THAT THE REGULATION S GLOBAL SECURITY IS BEING TRANSFERRED (A) TO A PERSON WHO THE TRANSFEROR REASONABLY BELIEVES TO BE A QUALIFIED INSTITUTIONAL BUYER WITHIN THE MEANING OF RULE 144A, (B) TO A PERSON WHO IS PURCHASING FOR ITS OWN ACCOUNT OR THE ACCOUNT OF A QUALIFIED INSTITUTIONAL BUYER IN A TRANSACTION MEETING THE REQUIREMENTS OF RULE 144A, AND (C) IN ACCORDANCE WITH ALL APPLICABLE SECURITIES LAWS OF THE STATES OF THE UNITED STATES AND OTHER JURISDICTIONS.

AFTER THE EXPIRATION OF THE DISTRIBUTION COMPLIANCE PERIOD, BENEFICIAL INTERESTS IN THIS TEMPORARY REGULATION S GLOBAL SECURITY MAY BE EXCHANGED FOR INTERESTS IN AN IAI GLOBAL SECURITY ONLY IF (1) SUCH EXCHANGE OCCURS IN CONNECTION WITH A TRANSFER OF THE SECURITIES IN COMPLIANCE WITH AN EXEMPTION UNDER THE SECURITIES ACT AND (2) THE TRANSFEROR OF THE REGULATION S GLOBAL SECURITY FIRST DELIVERS TO THE TRUSTEE A WRITTEN CERTIFICATE (IN THE FORM ATTACHED TO THIS CERTIFICATE) TO THE EFFECT THAT THE REGULATION S GLOBAL SECURITY IS BEING

TRANSFERRED (A) TO AN “ACCREDITED INVESTOR” WITHIN THE MEANING OF RULE 501(a)(1),(2),(3) OR (7) OF REGULATION D UNDER THE SECURITIES ACT THAT IS AN INSTITUTIONAL INVESTOR ACQUIRING THE SECURITIES FOR ITS OWN ACCOUNT OR FOR THE ACCOUNT OF SUCH AN INSTITUTIONAL ACCREDITED INVESTOR, IN EACH CASE IN A MINIMUM PRINCIPAL AMOUNT OF SECURITIES OF US$250,000, FOR INVESTMENT PURPOSES AND NOT WITH A VIEW TO OR FOR OFFER OR SALE IN CONNECTION WITH ANY DISTRIBUTION IN VIOLATION OF THE SECURITIES ACT AND (B) IN ACCORDANCE WITH ALL APPLICABLE SECURITIES LAWS OF THE STATES OF THE UNITED STATES AND OTHER JURISDICTIONS.

BENEFICIAL INTERESTS IN A RULE 144A GLOBAL SECURITY OR AN IAI GLOBAL SECURITY MAY BE TRANSFERRED TO A PERSON WHO TAKES DELIVERY IN THE FORM OF AN INTEREST IN THE REGULATION S GLOBAL SECURITY, WHETHER BEFORE OR AFTER THE EXPIRATION OF THE 40-DAY DISTRIBUTION COMPLIANCE PERIOD, ONLY IF THE TRANSFEROR FIRST DELIVERS TO THE TRUSTEE A WRITTEN CERTIFICATE (IN THE FORM ATTACHED TO THIS CERTIFICATE) TO THE EFFECT THAT SUCH TRANSFER IS BEING MADE IN ACCORDANCE WITH RULE 903 OR 904 OF REGULATION S OR RULE 144 (IF AVAILABLE).

[Definitive Securities Legend]

No.	US$
	CUSIP No.
	ISIN No.

7⅝% Senior Unsecured Notes due 2017

▇▇▇▇▇, S.A.B. de C.V., a Mexican corporation, promises to pay to , or registered assigns, the principal sum of United States Dollars on February 1, 2017.

Interest Payment Dates: February 1 and August 1.

Record Dates: January 15 and July 15.

Additional provisions of this Security are set forth on the other side of this Security.

Dated:

SIGNATURE PAGE FOLLOWS

IN WITNESS WHEREOF, the Company has caused this instrument to be duly executed.

Dated:

▇▇▇▇▇, S.A.B. de C.V.
By

	Name:
	Title:

By

	Name:
	Title:

TRUSTEE’S CERTIFICATE OF

AUTHENTICATION

THE BANK OF NEW YORK
as Trustee, certifies that this is one of the Securities referred to in the Indenture.

By
Authorized Signatory

[FORM OF REVERSE SIDE OF INITIAL SECURITY]

7⅝% Senior Unsecured Notes due 2017

1. Interest

▇▇▇▇▇, S.A.B. de C.V., a Mexican corporation (such corporation, and its successors and assigns under the Indenture hereinafter referred to, being herein called the “Company”), promises to pay interest on the principal amount of this Security at the rate per annum shown above. The Company will pay interest semiannually on February 1 and August 1 of each year, commencing August 1, 2007. Interest on the Securities will accrue from the most recent date to which interest has been paid or, if no interest has been paid, from February 2, 2007. Interest will be computed on the basis of a 360-day year of twelve 30-day months. The Company will pay interest on overdue principal at the rate borne by this Security plus 1.0% per annum, and it will pay interest on overdue installments of interest at the same rate to the extent lawful.

2. Method of Payment

The Company will pay interest on the Securities (except defaulted interest) to the Persons who are registered Holders of Securities at the close of business on the January 15 or July15 next preceding the interest payment date even if Securities are canceled after the record date and on or before the interest payment date. Holders must surrender Securities to a Paying Agent to collect principal payments. The Company will pay principal and interest in money of the United States that at the time of payment is legal tender for payment of public and private debts. Payments in respect of the Securities represented by a Global Security (including principal, premium and interest) will be made by wire transfer of immediately available funds to the accounts specified by The Depository Trust Company. The Company will make all payments in respect of a certificated Security (including principal, premium and interest) by mailing a check to the registered address of each Holder thereof; provided, however, that payments on a certificated Security will be made by wire transfer to a U.S. dollar account maintained by the payee with a bank in the United States if such Holder elects payment by wire transfer by giving written notice to the Trustee or the Paying Agent to such effect designating such account no later than 30 days immediately preceding the relevant due date for payment (or such other date as the Trustee may accept in its discretion). Payments made, whether by wire transfer or check, will be due and payable outside of Mexico.

3. Paying Agent and Registrar

Initially, The Bank of New York, a New York banking corporation (the “Trustee”), will act as Paying Agent and Registrar. The Company may appoint and change any Paying Agent, Registrar or co-registrar without notice. The Company or any of its domestically incorporated Wholly Owned Subsidiaries may act as Paying Agent, Registrar or co-registrar.

4. Indenture

The Company issued the Securities under an Indenture dated as of February 2, 2007 (“Indenture”), among the Company, the Subsidiary Guarantors and the Trustee. The terms of the Securities include those stated in the Indenture and those made part of the Indenture by reference to the Trust Indenture Act of 1939 (15 U.S.C.§§ 77aaa-77bbbb) as in effect on the date of the Indenture (the “Act”). Terms defined in the Indenture and not defined herein have the meanings ascribed thereto in the Indenture. The Securities are subject to all such terms, and Securityholders are referred to the Indenture and the Act for a statement of those terms.

The Securities are general unsecured obligations of the Company. The Company shall be entitled, subject to its compliance with Section 4.03 of the Indenture, to issue Additional Securities pursuant to Section 2.13 of the Indenture. The Securities issued on the Issue Date and any Additional Securities will be treated as a single class for all purposes under the Indenture. The Indenture contains covenants that limit the ability of the Company and its subsidiaries to incur additional indebtedness; pay dividends or distributions on, or redeem or repurchase capital stock; make investments; issue or sell capital stock of subsidiaries; engage in transactions with affiliates; create liens on assets; transfer or sell assets; guarantee indebtedness; restrict dividends or other payments of subsidiaries; consolidate, merge or transfer all or substantially all of its assets and the assets of its subsidiaries; and engage in sale/leaseback transactions. These covenants are subject to important exceptions and qualifications.

5. Optional Redemption

Except as set forth below, the Company shall not be entitled to redeem the Securities.

On and after February 1, 2012, the Company shall be entitled at its option to redeem all or a portion of the Securities upon not less than 30 nor more than 60 days’ notice, at the redemption prices (expressed in percentages of principal amount on the redemption date), plus accrued interest to the redemption date (subject to the right of Holders of record on the relevant record date to receive interest due on the relevant interest payment date), if redeemed during the 12-month period commencing on February 1 of the years set forth below:

Period	Redemption Price
2012		103.813	%
2013		102.542	%
2014		101.271	%
2015 and thereafter		100.000	%

In addition, prior to February 1, 2010, the Company shall be entitled at its option on one or more occasions to redeem Securities (which includes Additional Securities, if any) in an aggregate principal amount not to exceed 35% of the aggregate principal amount of the Securities (which includes Additional Securities, if any) originally issued at a redemption price (expressed as a percentage of principal amount) of 107.625%, plus accrued and unpaid interest to the redemption date, with the Net Cash Proceeds from one or more Equity Offerings; provided, however, that (1) at least 65% of such aggregate principal amount of Securities (which includes Additional Securities, if any) remains outstanding immediately after the occurrence of each such redemption (other than Securities held, directly or indirectly, by the Company or its Affiliates); and (2) each such redemption occurs within 90 days after the date of the related Equity Offering.

Prior to February 1, 2012, the Company shall be entitled at its option to redeem some or all of the Securities at a redemption price equal to 100.00% of the principal amount of the Securities plus the Applicable Premium as of, and accrued and unpaid interest to, the redemption date (subject to the right of Holders on the relevant record date to receive interest due on the relevant interest payment date). The Company shall cause notice of such redemption to be mailed by first-class mail to each Holder’s registered address, not less than 30 nor more than 60 days prior to the redemption date.

6. Redemption for Changes in Withholding Taxes

The Company shall be entitled to redeem the Securities in whole, but not in part, upon giving not less than 30 nor more than 60 days’ prior notice mailed by first class mail to each Holder’s registered address, at 100% of their principal amount, plus accrued and unpaid interest to the redemption date (subject to the right of Holders of record on the relevant record date to receive interest due on the relevant interest payment date) and including Additional Amounts payable in respect of such payment, if (i) the Company certifies to the Trustee immediately prior to the giving of such notice that as a result of any change in or amendment to the laws, regulations, general rules or treaties of any Relevant Taxing Jurisdiction, or any change in the application or official interpretation of such laws, regulations, general rules or treaties, which change or amendment became effective after the Issue Date, the Company has become or will become obligated to pay Additional Amounts with respect to the Securities in excess of the Additional Amounts that would be payable were payments of interest or discounts deemed to be interest on the Securities subject to a 10% withholding tax (“Excessive Additional Amounts”) and (ii) such obligations cannot be avoided by the Company taking reasonable measures available to it; provided, however, that (a) no such notice of redemption will be given earlier than 60 days prior to the earliest date on which the Company would be obligated to pay such Excessive Additional Amounts and (b) at the time such notice is given, the Company’s obligation to pay such Additional Amounts (including any Excessive Additional Amounts) remains in effect. Prior to giving of any notice of redemption described in this paragraph, the Company will deliver to the Trustee an Officers’ Certificate stating that the Company is entitled to effect such redemption in accordance with the terms set forth in this Security and setting forth in reasonable detail a statement of the facts relating thereto (together with a written Opinion of Counsel to the effect that the Company has become obligated to pay such Excessive Additional Amounts as a result of a change or amendment described above and that the Company cannot avoid payment of such Excessive Additional Amounts by taking reasonable measures available to it and that all governmental approvals necessary for the Company to effect such redemption have been obtained and are in full force and effect or specifying any such necessary approvals that as of the date of such opinion have not been obtained).

7. Notice of Redemption

Notice of redemption will be mailed at least 30 days but not more than 60 days before the redemption date to each Holder of Securities to be redeemed at his registered address. Securities in denominations larger than US$1,000 principal amount may be redeemed in part but only in whole multiples of US$1,000. If money sufficient to pay the redemption price of and accrued interest on all Securities (or portions thereof) to be redeemed on the redemption date is deposited with the Paying Agent on or before the redemption date and certain other conditions are satisfied, on and after such date interest ceases to accrue on such Securities (or such portions thereof) called for redemption.

8. Put Provisions

Upon a Change of Control, any Holder of Securities will have the right to cause the Company to purchase all or any part of the Securities of such Holder at a purchase price equal to 101% of the principal amount of the Securities to be purchased plus accrued interest to the date of purchase (subject to the right of Holders of record on the relevant record date to receive interest due on the related interest payment date) as provided in, and subject to the terms of, the Indenture.

9. Guaranty

The payment by the Company of the principal of, and premium and interest on, the Securities is fully and unconditionally guaranteed on a joint and several senior basis by each of the Subsidiary Guarantors to the extent set forth in the Indenture.

10 Denominations; Transfer; Exchange

The Securities are in registered form without coupons in denominations of US$2,000 principal amount and whole multiples of US$1,000 in excess thereof. A Holder may transfer or exchange Securities in accordance with the Indenture. The Registrar may require a Holder, among other things, to furnish appropriate endorsements or transfer documents and to pay any taxes and fees required by law or permitted by the Indenture. The Registrar need not register the transfer of or exchange any Securities selected for redemption (except, in the case of a Security to be redeemed in part, the portion of the Security not to be redeemed) or any Securities for a period of 15 days before a selection of Securities to be redeemed or 15 days before an interest payment date.

11. Persons Deemed Owners

The registered Holder of this Security may be treated as the owner of it for all purposes.

12. Unclaimed Money

If money for the payment of principal or interest remains unclaimed for two years, the Trustee or Paying Agent shall pay the money back to the Company at its request unless an abandoned property law designates another Person. After any such payment, Holders entitled to the money must look only to the Company and not to the Trustee for payment.

13. Discharge and Defeasance

Subject to certain conditions, the Company at any time shall be entitled to terminate some or all of its obligations under the Securities and the Indenture if the Company deposits with the Trustee money or U.S. Government Obligations for the payment of principal and interest on the Securities to redemption or maturity, as the case may be.

14. Amendment, Waiver

Subject to certain exceptions set forth in the Indenture, (a) the Indenture and the Securities may be amended with the written consent of the Holders of at least a majority in principal amount outstanding of the Securities and (b) any default or noncompliance with any provision may be waived with the written consent of the Holders of a majority in principal amount outstanding of the Securities. Subject to certain exceptions set forth in the Indenture, without the consent of any Securityholder, the Company, the Subsidiary Guarantors and the Trustee shall be entitled to amend the Indenture or the Securities to cure any ambiguity, omission, defect or inconsistency, or to comply with Article 5 of the Indenture, or to provide for uncertificated Securities in addition to or in place of certificated Securities, or to add guarantees with respect to the Securities, including Subsidiary Guaranties, or to secure the Securities, or to add additional covenants or surrender rights and powers conferred on the Company or the Subsidiary Guarantors, or to comply with any request of the SEC in connection with qualifying the Indenture under the Act, or to make any change that does not adversely affect the rights of any Securityholder.

15. Defaults and Remedies

Under the Indenture, Events of Default include (a) default for 30 days in payment of interest on the Securities; (b) default in payment of principal on the Securities at maturity, upon redemption pursuant to paragraph 5 or 6 of the Securities, upon acceleration or otherwise, or failure by the Company to redeem or purchase Securities when required; (c) failure by the Company or any Subsidiary Guarantor to comply with

other agreements in the Indenture or the Securities, in certain cases subject to notice and lapse of time; (d) certain accelerations (including failure to pay within any grace period after final maturity) of other Indebtedness of the Company if the amount accelerated (or so unpaid) exceeds US$20 million; (e) certain events of bankruptcy or insolvency with respect to the Company and the Significant Subsidiaries; (f) certain judgments or decrees for the payment of money in excess of US$20 million; and (g) certain defaults with respect to Subsidiary Guaranties. If an Event of Default occurs and is continuing, the Trustee or the Holders of at least 25% in principal amount of the Securities may declare all the Securities to be due and payable immediately. Certain events of bankruptcy or insolvency are Events of Default which will result in the Securities being due and payable immediately upon the occurrence of such Events of Default.

Securityholders may not enforce the Indenture or the Securities except as provided in the Indenture. The Trustee may refuse to enforce the Indenture or the Securities unless it receives indemnity or security satisfactory to it. Subject to certain limitations, Holders of a majority in principal amount of the Securities may direct the Trustee in its exercise of any trust or power. The Trustee may withhold from Securityholders notice of any continuing Default (except a Default in payment of principal or interest) if it determines that withholding notice is in the interest of the Holders.

16. Trustee Dealings with the Company

Subject to certain limitations imposed by the Act, the Trustee under the Indenture, in its individual or any other capacity, may become the owner or pledgee of Securities and may otherwise deal with and collect obligations owed to it by the Company or its Affiliates and may otherwise deal with the Company or its Affiliates with the same rights it would have if it were not Trustee.

17. No Recourse Against Others

A director, officer, employee or stockholder, as such, of the Company or the Trustee shall not have any liability for any obligations of the Company under the Securities or the Indenture or for any claim based on, in respect of or by reason of such obligations or their creation. By accepting a Security, each Securityholder waives and releases all such liability. The waiver and release are part of the consideration for the issue of the Securities.

18. Authentication

This Security shall not be valid until an authorized signatory of the Trustee (or an authenticating agent) manually signs the certificate of authentication on the other side of this Security.

19. Abbreviations

Customary abbreviations may be used in the name of a Securityholder or an assignee, such as TEN COM (=tenants in common), TEN ENT (=tenants by the

entireties), JT TEN (=joint tenants with rights of survivorship and not as tenants in common), CUST (=custodian), and U/G/M/A (=Uniform Gift to Minors Act).

20. CUSIP Numbers

Pursuant to a recommendation promulgated by the Committee on Uniform Security Identification Procedures the Company has caused CUSIP numbers to be printed on the Securities and has directed the Trustee to use CUSIP numbers in notices of redemption as a convenience to Securityholders. No representation is made as to the accuracy of such numbers either as printed on the Securities or as contained in any notice of redemption and reliance may be placed only on the other identification numbers placed thereon.

21. Governing Law

THIS SECURITY SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK.

The Company will furnish to any Securityholder upon written request and without charge to the Security holder a copy of the Indenture which has in it the text of this Security in larger type. Requests may be made to:

▇▇▇▇▇, S.A.B. de C.V.

Blvd. ▇▇▇▇ ▇▇▇▇▇ km. 3.33 No. L-1

Col. Unidad San ▇▇▇▇▇

San ▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇, ▇.▇.

Mexico, CP 66215

Telephone: ▇▇▇ (▇▇) ▇▇▇▇-▇▇▇▇

Facsimile: ▇▇▇(▇▇) ▇▇▇▇-▇▇▇▇

Attention: Chief Financial Officer

ASSIGNMENT FORM

To assign this Security, fill in the form below:

I or we assign and transfer this Security to

(Print or type assignee’s name, address and zip code)

(Insert assignee’s soc. sec. or tax I.D. No.)

and irrevocably appoint agent to transfer this Security on the books of the Company. The agent may substitute another to act for him.


Date:	Your Signature:

Sign exactly as your name appears on the other side of this Security.

In connection with any transfer of any of the Securities evidenced by this certificate occurring prior to the expiration of the period referred to in Rule 144(k) under the Securities Act after the later of the date of original issuance of such Securities and the last date, if any, on which such Securities were owned by the Company or any Affiliate of the Company, the undersigned confirms that such Securities are being transferred in accordance with its terms:

CHECK ONE BOX BELOW

(1)	¨ to the Company; or

(2)	¨ pursuant to an effective registration statement under the Securities Act of 1933; or

(3)

¨ inside the United States to a “qualified institutional buyer” (as defined in Rule 144A under the Securities Act of 1933) that purchases for its own account or for the account of a qualified institutional buyer to whom notice is given that such transfer is being made in reliance on Rule 144A, in each case pursuant to and in compliance with Rule 144A under the Securities Act of 1933; or

(4)	¨ outside the United States in an offshore transaction within the meaning of Regulation S under the Securities Act in compliance with Rule 904 under the Securities Act of 1933;

(5)	¨ pursuant to the exemption from registration provided by Rule 144 under the Securities Act of 1933; or

(6)	¨ to an institutional “accredited investor” (as defined in Rule 501(a)(1), (2), (3) or (7) under the Securities Act of 1933) that has furnished to the Trustee a signed letter containing certain representations and agreements.

Unless one of the boxes is checked, the Trustee will refuse to register any of the Securities evidenced by this certificate in the name of any person other than the registered holder thereof; provided, however, that if box (4), (5) or (6) is checked, the Trustee shall be entitled to require, prior to registering any such transfer of the Securities, such legal opinions, certifications and other information as the Company has reasonably requested to confirm that such transfer is being made pursuant to an exemption from, or in a transaction not subject to, the registration requirements of the Securities Act of 1933.

____________________________________

Signature

Signature Guarantee:

__________________________________________		___________________________________
Signature must be guaranteed		Signature

Signatures must be guaranteed by an “eligible guarantor institution” meeting the requirements of the Registrar, which requirements include membership or participation in the Security Transfer Agent Medallion Program (“STAMP”) or such other “signature guarantee program” as may be determined by the Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended.

TO BE COMPLETED BY PURCHASER IF (3) ABOVE IS CHECKED.

The undersigned represents and warrants that it is purchasing this Security for its own account or an account with respect to which it exercises sole investment discretion and that it and any such account is a “qualified institutional buyer” within the meaning of Rule 144A under the Securities Act of 1933, and is aware that the sale to it is being made in reliance on Rule 144A and acknowledges that it has received such information regarding the Company as the undersigned has requested pursuant to Rule 144A or has determined not to request such information and that it is aware that the transferor is relying upon the undersigned’s foregoing representations in order to claim the exemption from registration provided by Rule 144A.

Dated: ________________________________		_____________________________________
		Notice:To be executed by an executive officer

[TO BE ATTACHED TO GLOBAL SECURITIES]

SCHEDULE OF INCREASES OR DECREASES IN GLOBAL SECURITY

The following increases or decreases in this Global Security have been made:

Date of

Exchange

Amount of decrease in Principal amount of this Global Security

Amount of increase in Principal amount of this Global Security

Principal amount of this Global Security following such decrease or increase

Signature of authorized officer of Trustee or Securities Custodian

OPTION OF HOLDER TO ELECT PURCHASE

If you want to elect to have this Security purchased by the Company pursuant to Section 4.06 or 4.10 of the Indenture, check the box:

If you want to elect to have only part of this Security purchased by the Company pursuant to Section 4.06 or 4.10 of the Indenture, state the amount in principal amount: US$

Dated:		Your Signature:
		(Sign exactly as your name appears on the other side of this Security.)

Signature Guarantee:

(Signature must be guaranteed)

FORM OF TRANSFEREE LETTER OF REPRESENTATION

▇▇▇▇▇, S.A.B. de C.V.

Blvd. ▇▇▇▇ ▇▇▇▇▇ km. 3.33 No. L-1

Col. Unidad San ▇▇▇▇▇

San ▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇

▇.▇., Mexico, CP66215

The Bank of New York

▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇▇▇▇ ▇▇▇

New York, New York 10286

Attention: Corporate Trust Administration – Global Finance Unit

Ladies and Gentlemen:

This certificate is delivered to request a transfer of US$ principal amount of the 7⅝% Senior Unsecured Notes due 2017 (the “Notes”) of Axtel, S.A.B. de C.V., a Mexican variable capital corporation (the “Company”), all as described in the confidential offering circular (the “offering circular”) relating to the offering.

Upon transfer, the Notes would be registered in the name of the new beneficial owner as follows:

Name:

Address:

Taxpayer ID Number:

The undersigned represents and warrants to you that:

1. We are an institutional “accredited investor” (as defined in Rule 501(a)(1), (2), (3) or (7) of Regulation D under the Securities Act of 1933, as amended (the “Securities Act”)) purchasing for our own account or for the account of such an institutional “accredited investor” at least US$250,000 principal amount of the Notes, and we are acquiring the Notes not with a view to, or for offer or sale in connection with, any distribution in violation of the Securities Act. We have such knowledge and experience in financial and business matters as to be capable of evaluating the merits and risks of our investment in the Notes, and we invest in or purchase securities similar to the Notes in the normal course of our business. We, and any accounts for which we are acting, are each able to bear the economic risk of our or its investment.

2. We understand that the Notes have not been registered under the Securities Act and, unless so registered, may not be sold except as permitted in the following sentence. We agree, on our own behalf and on behalf of any investor account for which we purchasing Notes, to offer, sell or otherwise transfer such Notes prior to the date that is two years after the later of the date of original issue and the last date on which the Company or any affiliate of the Company was the owner of such Notes (or any predecessor thereto) (the “Resale Restriction Termination Date”) only (a) to the Company, (b) pursuant to a registration statement that has been declared effective under the Securities Act, (c) in a transaction complying with the requirements of Rule 144A under the Securities Act (“Rule 144A”) to a person we reasonably believe is a “qualified institutional buyer” under Rule 144A (a “QIB”) that purchases for its own account or for the account of a QIB and to whom notice is given that the transfer is being made in reliance on Rule 144A, (d) pursuant to offers and sales that occur outside the United States within the meaning of Regulation S under the Securities Act, (e) to an institutional “accredited investor” within the meaning of Rule 501(a)(1), (2), (3) or (7) of Regulation D under the Securities Act that is purchasing for its own account or the account of such an institutional “accredited investor,” in each case in a minimum principal amount of

Notes of US$250,000, or (f) pursuant to any other available exemption from the registration requirements of the Securities Act, subject in each of the foregoing cases to any requirements of law that the disposition of our property or the property of such investor account or accounts be at all times within our or their control and in compliance with any applicable state securities laws. The foregoing restrictions on resale will not apply subsequent to the Resale Restriction Termination Date. If any resale or other transfer of the Notes is proposed to be made pursuant to clause (e) above prior to the Resale Restriction Termination Date, the transferor shall deliver a letter from the transferee substantially in form of this letter to the Company and the trustee which shall provide, among other things, that the transferee is an institutional “accredited investor” within the meaning of Rule 501(a)(1), (2), (3) or (7) of Regulation D under the Securities Act and that the transferee is acquiring such Notes for investment purposes and not for distribution in violation of the Securities Act.

____________________________________

(Name of Transferee)

By: ________________________________

Name:

Title:

Address:

Date:

Axtel, S.A.B. de C.V. Issuer The Subsidiary Guarantors named herein 7⅝ % Senior Unsecured Notes due 2017

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