Go At&T, I just left T-mo and signed over to At&t. It was the best move I made. I like T-mo but the options to have all the 3g goods is there. Trust me, make the move, you wont regret it.

I have sold At&t and i am currently selling T-mobile. Honestly the 3G network will get you extra features you will end up spending an arm and a leg to get, and if you dont have 3G in your area t, its kinda pointless. Get a 3G phone, you have the opportunity for TV, Radio and all that good stuff, but starting at 19.99 extra to your plan, then if you want mobile tv add another 9.99, mobiradio another 9.99. So if you dont plan on using that kinda stuff and wanting to spend that kinda money. T-mobile offers a 14 day trial, get a new number and if you like the service port your number in from At&t. the Myfav's is a really good plan along with the anytime minutes, and the message/web packages are cheap.