1. Find "Set up SIM card lock"
Slide two fingers downwards starting from the top of the screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-9f080bf9-dfcd-4cf3-9881-0b23c891ca45.png?width=206&height=368)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-ccf9b0e9-11e3-4df5-8975-892f3e871d72.png?width=206&height=368)
Press Security.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-5ef33d00-a685-46dc-b8bb-5d5d4727ef8f.png?width=206&height=368)
Press Set up SIM card lock.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-088589c6-72e0-4a96-a7e9-b93eee88e031.png?width=206&height=368)
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-c5689704-1350-4e65-939a-8b4bc32b787f.png?width=206&height=368)
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-b891292c-2433-4f50-b050-fc664a0983cc.png?width=206&height=368)
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-c5689704-1350-4e65-939a-8b4bc32b787f.png?width=206&height=368)