Contact the carrier that locked the SIM
Request an official SIM unlock
Confirm the device is eligible for unlocking
Pay any outstanding balance on the account
Complete any required contract or installment period
Provide the device IMEI if requested
Follow the carrier’s unlock instructions
Insert a SIM card from another carrier to test the unlock
Use the device’s built-in unlock menu if provided by the carrier
Restore or update the device software if the carrier requires it
If the device is secondhand, ask the previous owner or original carrier for unlock status
Avoid unauthorized unlocking tools or services