How to Sim Card Pin Unlock
Protecting your SIM card with a separate password can help thwart anyone's attempts to use your SIM in another device. But what if you need to switch phones and forgot your SIM card password? The only way to unlock a password-protected SIM is to get a special code called a PUK (PIN unlock key) from your mobile provider. The provider may need you to prove your identity to give you this code. This wikiHow teaches you how to use a PUK to unlock your SIM card.
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