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The PIN protects your SIM from unauthorised use if your phone should get stolen. You can change your PIN to a PIN easier to remember of your choice. To change your PIN, you need to turn on use of PIN.
1. Find "Change SIM PIN"
Slide two fingers downwards starting from the top of the screen.
Press the settings icon.
Press Lock screen & security.
Press SIM card lock.
Press Change SIM PIN.
2. Change PIN
Key in your current PIN and press OK.
If an incorrect PIN is entered three times in a row, your SIM will be blocked. To unblock your SIM, you'll need to key in your PUK. You can get the PUK by calling customer services on 191 from a Vodafone mobile phone. If you're using a land line, you need to dial 03333 040 191. Please note: If you key in the wrong PUK ten times in a row, your SIM will be blocked permanently. In this case, you need a new SIM from Vodafone.
Key in a new four-digit PIN and press OK.
Key in the new PIN again and press OK.
3. Return to the home screen
Press the Home key to return to the home screen.