Exhibit 99.1
AGREEMENT TO BE BOUND
BY VOICESTREAM VOTING AGREEMENT
The undersigned, TDSI Corporation, being the transferee from Telephone
and Data Systems, Inc. ("TDS") of 35,570,493 shares of the common stock, par
value $.001 per share, of VoiceStream Wireless Corporation, a Delaware
corporation (the "Company"), as a condition to the receipt of such shares,
acknowledges that matters pertaining to the voting of such shares is governed by
the Voting Agreement among the Company and certain stockholders of the Company
("Company Stockholders"), as accepted by TDS on May 4, 2000, and as amended by
the First Amended and Restated Voting Agreement dated as of July 23, 2000 among
the Company, Company Stockholders, TDS and Deutsche Telekom, AG (collectively,
the "Agreement"), and hereby (1) acknowledges receipt of a copy of the
Agreement, and (2) agrees to be bound, to the same extent as TDS has heretofore
been bound, by the terms of the Agreement, as the same has been or may be
amended from time to time.
Agreed to this 27th day of December, 2000.
TDSI CORPORATION
By: /s/ LeRoy T. Carlson, Jr
--------------------------------
Name: LeRoy T. Carlson, Jr.
Title: President
Address for notice:
TDSI Corporation
c/o Telephone and Data Systems, Inc.
30 North LaSalle, Suite 4000
Chicago, Illinois 60602
Attn: Chairman
Telecopy No.: 312-630-9299
with a copy to:
Sidley & Austin
One First National Plaza
Chicago, Illinois 60603
Attn: Michael G. Hron, Esq.
Telecopy No.: 312-853-7036
