Go to att.com/deviceunlock.
Read the eligibility requirements and click the Continue button.
I am no longer a customer of AT&T, so I choose a Non-AT&T Mobility customer.
Enter information such as IMEI number, first and last name, and email address.
AT&T will send you an email address asking you to click on a link to confirm your unlock request. If you do not confirm this email, AT&T will cancel your unlock request within 24 hours.