An analyst at Kaufman Brothers thinks that will be the case. The analyst believes that the GSM network of T-Mobile puts it ahead of Verizon to get the iPhone when the exclusivity deal with AT&T runs out. Both the 3GS and 4 models of the iPhone are compatible with the 2100MHz frequency used by T-Mobile, AT&T uses 1900MHz. The CDMA network used by Verizon would require much more modification to work. The analyst feels that the 34 million users of T-Mobile would welcome the iPhone, and that it would help combat the onslaught of Android phones. However, another analyst at J. Gold Associates feels that the much larger install base, marketing budget, and 3G coverage tip the scales in favor of Verizon.