T-Mobile testing the iPhone?

BGR got hooked up with some pictures of what seems to be a iPhone prototype for T-Mobile USA. We are hearing that this has the bands for T-Mobile’s 3G network and looks almost identical to the current iPhone 4 model available on Verizon and AT&T. For this reason, we are led to believe that this is the white iPhone 4 just with T-Mobile compatibility. This rumor, along with the fact that the white iPhone 4 is scheduled to drop sometime this Spring, leads us to believe that the next-generation iPhone will not be coming this Summer. The pictures also show what seems to be the next iOS update which was previously leaked in a video coming out of Vietnam