Most mobile phones offer a security protection that, if activated, requires a PIN number to activate the phone after we switch on. What causes my cellular phone to become locked? It is in fact the same as PUC, a similarly derived from Pin Unlocking Code. Few of us have heard of either acronym unless, through some error on our part, our GSM mobile phone, cellular phone or smartcard security feature becomes locked, and we are asked to insert the phones unique four to eight digit PIN ( Personal Identification Number) to reverse the measure. The acronym PUK is derived from the term Pin Unlocking Key. The PUK (or PUC) number is the PIN code needed to unfreeze the sim card. Has your mobile phone stopped working? Did you enter an incorrect pin number too many times? Is it showing a Locked SIM message? Does it ask for a PUK code? If it asking for a PUK key then you have probably messed with the security settings on your cell phone and the SIM card is now blocked. Is your mobile phone SIM blocked? Is it asking for a PUK code?
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