When you enter the wrong PIN for your mobile more than three times, your SIM card will be locked. This prevents anyone from trying to guess your PIN. To unlock your phone, you'll need a Personal Unlocking Key (PUK) code.

You can find your PUK code on the package that your SIM card came with, or you can find it by signing in to One NZ.

If you no longer have your SIM packaging, then follow the steps in "Get your PUK code".

Once you have it, enter your PUK code on your mobile, just as you would with a phone number.

Simply enter: * * 05 * PUK code * new PIN * new PIN #

Please note: If an incorrect code is entered too many times, the SIM card will become permanently blocked (between 7-10 attempts depending on the handset).