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-6931f341-63a4-4506-9e03-fdac9749ff73.png?width=206&height=450)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-f4b974ae-81d7-4050-a19f-8679a7cce2ab.png?width=206&height=450)
Press Security.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-390e43a4-4e68-4fa9-94d0-c3893b777fa4.png?width=206&height=450)
Press SIM card lock.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-e74d176e-0932-42f7-9126-70491ef6ae43.png?width=206&height=450)
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-c95598b4-1cbd-434c-8a57-71bd740d021f.png?width=206&height=450)
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-f11ec70c-47ed-4d7f-857c-fc2cf698cb8a.png?width=206&height=450)
3. Return to the home screen
Slide your finger upwards starting from the bottom of the screen to return to the home screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-c95598b4-1cbd-434c-8a57-71bd740d021f.png?width=206&height=450)