When you enter the wrong PIN for your mobile more than three times, your SIM card will be locked. This prevents anyone trying to guess your PIN. To unlock it, you'll need a PIN Unlocking Key (PUK) code. You can find your PUK code on the package your SIM card came in. If you don't have this:
Get your PUK code in My Vodafone
Sign in to My Vodafone
Click on Profile menu at the top of the screen
Select PUK code from the menu
Your PUK code is shown on the resulting page.
Get your PUK code over the phone
Call us on 0800 800 021
If you’re overseas, call +64 9 355 2007*
*Standard international calling rates apply
Steps to unlock your SIM card using a PUK code
Once you have your PUK code, enter your PUK code on your mobile as you would a phone number.
The formula to follow is: * * 05 * PUK code * new PIN * new PIN #
So, on your mobile phone's keypad enter:
star, star, 0, 5, star, 'PUK code', star, '1-8 digit number', star, 'repeat 1-8 digit number', hash
Please note: If an incorrect code is entered too many times, the SIM card will be permanently blocked (between 7-10 attempts depending on handset).