Confirm the phone is paid off
Make sure the account is in good standing
Verify the device has been active on T-Mobile for at least 40 days
Ensure the phone is not reported lost, stolen, or blocked
Check that the device is eligible for unlocking
Use the T-Mobile app or website to request an unlock if available
Contact T-Mobile customer support to request the unlock
Follow any on-screen instructions or approval steps
Insert a different carrier’s SIM card after unlocking
Restart the phone if needed to complete activation