1. Find "More security settings"
Press Settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7090424-f-69cd5224-b63e-4533-ab51-976890122e78.png?width=206&height=456)
Press Passwords & security.
![](http://wmstatic.global.ssl.fastly.net/ml/7090424-f-79ec06a1-468b-441d-9701-e0bf3083b898.png?width=206&height=456)
Press Privacy.
![](http://wmstatic.global.ssl.fastly.net/ml/7090424-f-4e271e4d-60d2-46b6-9147-1ec85922d57f.png?width=206&height=456)
Press More security settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7090424-f-806e73ac-056a-4b0f-bd49-dcf936e1f099.png?width=206&height=456)
2. Turn use of PIN on or off
Press the name of the SIM.
![](http://wmstatic.global.ssl.fastly.net/ml/7090424-f-2ecfae15-bbd2-493d-a376-641b10b2c686.png?width=206&height=456)
Press the indicator next to "Lock SIM card" to turn the function on or off.
![](http://wmstatic.global.ssl.fastly.net/ml/7090424-f-0c5c08d1-9e56-4e1e-b4d9-3c40bec5d4dd.png?width=206&height=456)
Key in your 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. The PUK can be obtained by contacting customer services. 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.
![](http://wmstatic.global.ssl.fastly.net/ml/7090424-f-24839dbb-e98e-4530-b22f-70511cd46433.png?width=206&height=456)
3. Return to the home screen
Press the Home key to return to the home screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7090424-f-0c5c08d1-9e56-4e1e-b4d9-3c40bec5d4dd.png?width=206&height=456)