Step Determine if your AT&T cell phone is CMDA or GSM. Ezdrummer Jazz Keygen on this page. CMDA phones cannot be unlocked, while GSM phones can. The difference is in the SIM card. GSM phones use SIM cards to connect to the AT&T phone network while CMDA phones don't have SIM cards and the connection is 'hardwired' into the phone itself. By unlocking a phone, all you have to do is switch the SIM card to change service. You can see why it's tough (if not impossible) to unlock CMDA phones. Step Call AT&T. Iphone 5c Ee Unlocking Service on this page.

The best and most accurate way to unlock your AT&T cell phone is to call your service provider. Keep in mind, however, that if you are under contract with the cell phone provider, they may not want to unlock your phone. Unlocked Phones Compatible With Cricket. You should wait until the contract expires to switch the service.