And I see this :
Of the U.S. carriers, AT&T and T-Mobile use GSM while Sprint, Verizon, and smaller carriers such as such as MetroPCS and U.S. Cellular use CDMA. Though Nextel is part of Sprint, Nextel-branded phones use a third technology called iDEN, or Integrated Digital Enhanced Network.
I’m not sure. I know I don’t usually agree with their computing picks, so I may not agree with their pda/phone/device picks, either. They seem to be more smartphone oriented than complete pda/phone solutions. I don’t really care for smartphones. They’re like the iPhone, locked down too tight. I need freedom! LOL
I have had nextel for business reasons, and I liked the 2 way. I had 14 phones from them for my employees, which were a mix of different models. Some of those did work by putting in my T-Mo SIM card, but most did not. Motorola used to sell iDen kits on their website (they may still), and you could get into the ROM with those. So, if you are thinking of going that way, check on http://www.howardforums.com/index.php? or some Motorola specific sites and see which phone is most likely able to be modified or do what you want it to.
BTW, AT&T have both CDMA and GSM. (they bought Bell South a few years ago) Check the phone to be sure.
My wife had a Razor, and it had a good signal, whereas my HTC Wizard does not. She now has a Crackberry, and it pulls in 5 bars, but the data rate is so slow!