EXHIBIT 99.4 W.R. HUFF ASSET MANAGEMENT CO., L.L.C. 67 Park Place, Ninth Floor Morristown, New Jersey 07960 February 8, 1999 Arch Communications Group, Inc. 1800 West Park Drive Suite 250 Westborough, Massachusetts 01581 MobileMedia Communications,...Commitment Amendment • March 3rd, 1999 • Arch Communications Group Inc /De/ • Radiotelephone communications • Delaware
EXHIBIT 10.8 THE NORTHWESTERN MUTUAL LIFE INSURANCE COMPANY 720 East Wisconsin Avenue Milwaukee, Wisconsin 53202 December 1, 1998 Arch Communications Group, Inc. 1800 West Park Drive Suite 250 Westborough, Massachusetts 01581 MobileMedia...Commitment Amendment • December 7th, 1998 • Arch Communications Group Inc /De/ • Radiotelephone communications • Delaware