![]() 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. It is sometimes also called a PUC - personal unblocking code. If you have forgotten what code your SIM card has, you can retrieve this information from Verizons. First things first: What is a PUK code and where can you find it? The PUK code is a security feature of your SIM card. If you do not know your Android version, read How to check the Android version on your smartphone or tablet. The procedures are similar on all Android-powered devices, so you should be good to go even if you have a smartphone from Samsung, Huawei, OnePlus, or some other manufacturer. 1 First, you will need to contact your mobile operator (ex: AT&T, Verizon, T-Mobile, etc) to get a PIN Unblocking Key ( PUK) code for the blocked SIM card. ![]() Your phone will become locked, and you will need the PUK code to unlock it. ![]() You will need the PUK code if you have set a SIM Card lock and entered the wrong passcode 3 times. Its a unique code that is linked to your mobile phone’s SIM card and is usually 8 digits long. NOTE: For this tutorial, we used an ASUS ZenFone Max Pro device running Android 9 Pie. A PUK code stands for Personal Unlock Key.
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