A PUK code is required if a GSM SIM card was locked after entering the wrong PIN code three times in a row. Entering a wrong PUK code ten times in a row disables the SIM card permanently.

When you enter the wrong PIN more than three times, your SIM card will be locked. This is a security measure to prevent people from guessing your PIN. You'll need a PIN Unlocking Key (PUK ...

The only thing that changes is your PIN and PUK numbers, while RICA details will be transferred to the new card. Discover how ...