1. Find "Set up SIM card lock"
Slide two fingers downwards starting from the top of the screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-41c9ec0d-203c-4814-9e4c-9227dfd66e30.png?width=214&height=380)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-41d5d634-a082-4a8f-9e61-2185080ad44a.png?width=214&height=380)
Press Security.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-7d5e5820-c5bb-4f54-8493-643090f394c2.png?width=214&height=380)
Press Set up SIM card lock.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-3777f8ff-682b-455b-923e-0d204bd27d8f.png?width=214&height=380)
2. Turn use of PIN on or off
Press the field next to "Lock SIM card" to turn the function on or off.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-b78b8963-1f96-4d7d-ae10-16c622c25caa.png?width=214&height=380)
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-6a246eb4-f3e5-4186-a234-0acf37f19859.png?width=214&height=380)
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-b78b8963-1f96-4d7d-ae10-16c622c25caa.png?width=214&height=380)