1. Find "Set up SIM card lock"
Slide your finger downwards starting from the top of the screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-47aa0ad2-b922-4d6c-8646-0a4141ccbc58.png?width=208&height=426)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-fccf707e-0f5e-46ac-b3b5-3ae2cab37115.png?width=208&height=426)
Press Lock screen and security.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-4fcd13ca-4f3e-494a-b8a6-a87b5cd074d3.png?width=208&height=426)
Press Other security settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-30b51824-fc5f-4864-b7e4-e7d1a97fb5e4.png?width=208&height=426)
Press Set up SIM card lock.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-5af24c69-f43f-463a-aaff-9b03d6dabf28.png?width=208&height=426)
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-8d220995-b30f-438f-b3ca-9225fd3668c5.png?width=208&height=426)
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-6038bdd6-1f5a-472f-97af-355099171c01.png?width=208&height=426)
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-8d220995-b30f-438f-b3ca-9225fd3668c5.png?width=208&height=426)