Update: TmoNews has just uncovered new specs and info on the phone. Here's what they've got so far: the phone is 4.6 x 2.16 x 0.63 inches, weighs 5.6 ounces, features a 480 x 320 HVGA display, sports 3G (obviously), GPS, has a 3.1-megapixel camera, supports up to 8GB of memory (though no format is mentioned), and will feature 5 hours of talktime with 130 hours of standby. Strangely, the phone won't do video capture (what?), won't have stereo Bluetooth, will require a Gmail account, and won't be sold at stores outside of a 2-5 mile radius of T-Mobile's 3G coverage areas. That last bit sounds a little odd to us, but we're guessing a lot of the functionality of this device will be shot in non-3G regions.
Meet the T-Mobile G1