1. Find "Set up SIM card lock"
Press Settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-9c2b41b2-a9aa-4893-8b8d-65a248948e2e.png?width=212&height=376)
Press Advanced settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-1bcda258-000b-4a29-bba2-8714e65c05c4.png?width=212&height=376)
Press Security.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-26681fdf-b763-4a7c-b3b5-3fefd3276010.png?width=212&height=376)
Press Set up SIM card lock.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-a84b2261-2c89-4be0-9473-ca78d28e34c3.png?width=212&height=376)
2. Turn use of PIN on or off
Press the indicator next to "Lock SIM card" to turn the function on or off.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-8f8835cb-d038-4d0a-9b3c-847148f55b79.png?width=212&height=376)
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/7140723-f-c70c1600-c71d-47b4-98d7-a7839870bc87.png?width=212&height=376)
3. Return to the home screen
Press the Home key to return to the home screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-8f8835cb-d038-4d0a-9b3c-847148f55b79.png?width=212&height=376)