There are various ways to unblock a SIM card that has been blocked as a result of error while entering a PIN or security code. The number of times a PIN can be entered before the SIM card or the phone gets blocked differs from phone to phone. In such a case, you will have to either purchase a new card or a new phone, or you will have to get a PUK (personal unblocking key) code. This is one of those cell phone safety features that might frustrate you at times. Why? Because, if you enter a wrong PIN (personal identification code) or security number 3 times, either your SIM card or your cell phone gets blocked. However, these features can become a cause of trouble for some. The security features of your mobile phone are a great way to safeguard your cell phone and its contents. Have you accidentally blocked your SIM card? Well, all you need is a PUK code to unblock SIM card, which is furnished by your service provider so that your SIM can operate again.
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