T-Mobile in the US is well known for its 1700MHz 3G band that leaves incompatible devices on EDGE. But reports are appearing that a 1900MHz band has become available in parts of Nevada, Northern California and the Northwest. That's great news for the reported 1 million iPhone users on T-Mobile's networks, since that's a 3G band supported by their Apple phones. Several other phones can jump on the new frequency too - Samsung's Galaxy S, S II and Tab, the HTC Radar and Huawei Springboard are reported to have had success.
GSM Arena, T-Mobile USA supplying 3G for unlocked iPhones in some areas