![]() If you attempt to lock your Airtel SIM card but fail to input the original PIN three times, the SIM will be locked and can only be unlocked by entering the Airtel PUK code. So make sure you misplace or forget the previous PIN. If you wish to replace the default pin to a custom pin, you’ll also need the original pin. When you try to lock your SIM, this initial PIN is used. Which is gernerally used to prevent unauthorised people from accessing SIM card information.Ī SIM card usually comes with a 4-8 digit PIN by default. The Airtel service provider also offers this PUK feature in their SIM cards. You may lock and secure your SIM in the same way. It is very much similar like you lock or protect your phone. The PUK code is an abbreviation for “personal unlocking key.” This function is available on all smartphones and protects your SIM card information stored for the users.
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