Have you purchased an AT&T phone which is "Locked" and you are unable to use it on another Service Provider Network? In order to Unlock an AT&T Phone to work on another network, you will require what is called a Remote Unlock Code. Most cell phones were built to accept an unlock code to release the lock set by the carrier. These Unlock Codes are specific according to your phone's IMEI number. Once you enter the AT&T Unlock code into your device, the AT&T lock will be released, and you will be free to use your AT&T Phone on another Service Provider. Once you receive the AT&T Unlock Code from us, you will also receive detailed code input instructionsContract or blacklist phones do not cover the refund process. Phones with 0 attempts or from other operators do not cover the refund process.