I sent to AT&T unlocking request for my iPhone 4 and after some times i get message that my iPhone can be unlocked. So my unlock was approved!!! I get instruction and i try all methods to get unlock but no happy!!! I check my IMEI after 1 month here: http://iphoneimei.info And its says that this still locked!!! How it possible that AT&T unlocked it but iPhone imei still locked!??? Have you any ideas????