Wireless phones purchased from AT&T generally come with locked SIMs, which potentially makes them incompatible with wireless service from non-AT&T providers.
To use an AT&T phone on another wireless network, you must unlock its SIM using an Unlock Code.
AT&T will provide the Unlock Code for phones on wireless plans if:
- Your wireless service has been active for 90 days or longer
- Your account is current and in good standing
- Your phone is not sold exclusively by us
- Your phone's Unlock Code is available from the Manufacturer