- Telecom New Zealand Help-->
Every SIM comes with a security PIN1 and PUK1 code.
A PIN1 - code safeguards access to the information on your mobile phone by locking your SIM.
A PUK1 code is a personal unblocking key. If you enter the PIN1 code incorrectly 3 times, you will need your PUK1 code to unlock your SIM.
Note: If your PUK1 code is entered incorrectly 10 times, the SIM will be cancelled. It cannot be reactivated.