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. Android 9 Find and tap Settings Lock screen & security Advanced SIM card lock. Tap the switch beside Lock SIM card to lock or unlock the SIM card. The SIM card unlock process is roughly the same for other providers such as MetroPCS, Cricket Wireless, Virgin Mobile etc. Find and tap Settings Security (More security settings) SIM card lock. 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. 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. 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.

Re-type the new SIM card PIN, then tap OK.The process to unlock an AT&T SIM card is similar to Verizon’s.

Enter the new SIM card PIN, then tap OK.Enter the old SIM card PIN, then tap OK.If your PUK code was delivered to you by email: You got an email with multiple codes, including PUK1, PIN2, and PUK2. Go to your phone's settings to customize your PIN code after using a PUK code to unlock your SIM card. Find and tap Settings → Lock screen & security → Advanced → SIM card lock. You must input a PUK (PIN Unlock Key) code to unlock your SIM card.Tap the switch beside Lock SIM card to lock or unlock the SIM card.Find and tap Settings → Security → (More security settings) → SIM card lock. If you insert the wrong PIN code three times, your SIM card is locked, and you need its PUK code to unlock it.When a SIM card is locked, the subscription linked to the card is protected against misuse, meaning that you have to enter a PIN every time you start your device. You can lock and unlock each SIM card you use on your device with a PIN (Personal Identity Number). Note: If you enter an incorrect PUK code too many times, you need to contact your network operator to get a new SIM card.

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