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-971a49f0-f025-4f7a-9090-42a5f84cc3be.png?width=204&height=442)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-a1c81f7e-06f8-4943-9181-37ff3a9eeef8.png?width=204&height=442)
Press Security.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-d9cff229-30b6-4f38-be04-2ee7448639a8.png?width=204&height=442)
Press SIM card lock.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-37a64f42-057c-4cf1-b61c-e84ff8ef17c6.png?width=204&height=442)
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-1b7b2746-5bfd-4528-849e-398f2057cc41.png?width=204&height=442)
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-e27ac6a7-83c5-42f1-b5c2-0186b70aa20f.png?width=204&height=442)
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-1b7b2746-5bfd-4528-849e-398f2057cc41.png?width=204&height=442)