Contact the provider over the phone if you cannot find one or visit a local store for assistance. Log into your online account and check for a PUK code option. The SIM card unlock process is roughly the same for other providers such as MetroPCS, Cricket Wireless, Virgin Mobile etc.

If you are no longer a Sprint customer but have paid off your device, unlock your SIM card by calling Sprint's support number or going to a local Sprint store. Unlocking your phone allows you to use the local wireless service by purchasing a SIM card from. To get the PUK code for your Sprint phone online log into your Sprint account and click “Get My PIN1/PUK1 Unlock Code.' Open the 'Phone' app on your device to access the dialer, and then type in your PUK code. One common reason to unlock a phone is international travel. Sprint offers SIM card unlock services both online and via its 88 number. Visit your local AT&T store to get the SIM card unlocked as an alternative to using the online process. If your device is not currently displaying “Enter PUK,” press “* 05” and then type in the PUK code. Click “Get Your PIN Unlock Key (PUK).” Launch the 'Phone' app on your device, type this PUK number into your locked SIM card Android or iPhone device and then tap “OK/Yes” to unlock the SIM card. Log into your AT&T wireless account and navigate to “My Wireless” followed by “My Devices & Features” and then click on the SIM card locked device. If you insert the wrong PIN code three times on your Android smartphone, either when starting the device or when trying to change or remove the SIM PIN, your SIM card becomes PUK-locked. The process to unlock an AT&T SIM card is similar to Verizon’s. It is sometimes also called a PUC - personal unblocking code.

Puk code for verizon sim card