Find a friend that uses AT&T that has been in a contract with them for more than 90 days. Have them call AT&T, have them give all their info with the IMEI number of the phone you wish to unlock. They don't keep track of that stuff, they just need this info to make sure you have a contract with them. If this friend gives them your email address you should have the unlock code with insturctions in a few days (if not hours)