1. Find "SIM card lock"
Slide two fingers downwards starting from the top of the screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-80d3084c-dcfb-4cbd-8407-d84e16fb6a6e.png?width=204&height=430)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-4db2b8ce-df66-4c50-8715-ec0fb3f9df74.png?width=204&height=430)
Press Security.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-d5fc29e3-17cf-49e9-bb3c-607ffe284d44.png?width=204&height=430)
Press SIM card lock.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-a7f4afb4-d045-4637-8f5d-233bf963c5c2.png?width=204&height=430)
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-0facdaab-b8ad-499c-91d2-a617febf4488.png?width=204&height=430)
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-fe166158-c81a-422d-9a63-5635bc3cc34d.png?width=204&height=430)
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-0facdaab-b8ad-499c-91d2-a617febf4488.png?width=204&height=430)