Okay, a few days ago I managed to find a 3GS. It was just sitting there on a bench. <.< I grabbed it. Meh. Whatever. But anyways... It had an O2 Sim Card in there. It was a UK iPhone 3GS. I unlocked it. Works great. 3G even. Yay. MMS does not work. -_- I'm not sure whether it has to do with the carrier information....dunno. Anyway, any help with this would be appreciated. I have seen a lot of threads for unlocking an AT&T iPhone for use WITH O2, but not an O2 iPhone for use with AT&T. Thanks in advance for any help.