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-baf8c3ff-5606-4a2d-b191-bbcae3927f9b.png?width=198&height=444)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-88f9f90b-6a2b-4336-b863-cc7847bbe91a.png?width=198&height=444)
Press Security.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-4d60e8c6-7884-4479-b4a6-f482fcef2d33.png?width=198&height=444)
Press SIM card lock.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-a6073149-5e31-471e-aeb7-477248752e6e.png?width=198&height=444)
2. Turn use of PIN on or off
Press the required SIM.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-6548281f-0002-4b7a-a2c1-b424bf15ac60.png?width=198&height=444)
Press the indicator next to "Lock SIM Card" to turn the function on or off.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-2842ac92-e402-4cba-8dd0-4cd842be577f.png?width=198&height=444)
Key in your PIN and press the confirm icon.
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-738ee5a0-c7e1-452d-a433-40be115c7d92.png?width=198&height=444)
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-2842ac92-e402-4cba-8dd0-4cd842be577f.png?width=198&height=444)