Worth noting that the Tmobile $79 is unlimited talk, not just unlimited mobile to mobile.
T mob could be selling there services for half the price of Sprints, there's no way I'm going back to that network, 2 weeks was enough. Hardly had service inside my house, reception was always an issue, 3g lacks. here in NY it just doesn't cut it compared to the bigger 3, Sprint, ATT and Verizon. Only thing in favor is the phone selection.
YES Tmobile does have a great phone selection and the GSM phones for that matter seem to come first. I have thought about ATT for their 3G but cant seem to find the reasoning to pay 40-$50 more for the same service.