I just bought a 3g iPhone that has never been activated. It has been jailbroken but not unlocked. It also has the baseband that will not allow it to be unlocked. I don't have an active AT&T sim card to test the phone. Everything works via wifi but when I put a sim in it just doesn't recognize it. Since it is not unlocked will it still work for an AT&T subscriber with a 3g sim card?