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-4ea2d625-fd94-4805-aee0-2a446685576d.png?width=206&height=412)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-8c8905d0-6b28-407c-91d9-9f99c8550413.png?width=206&height=412)
Press Security.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-94456eb6-c566-4cb2-b226-b0d9ba800834.png?width=206&height=412)
Press SIM card lock.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-2acdd2aa-29a5-4322-9c69-56002a4ef842.png?width=206&height=412)
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-a0b0bf68-0d9d-45ee-96ec-2f180cadee3c.png?width=206&height=412)
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-91c00b4e-6e48-4190-ad73-a6c03bc55dbc.png?width=206&height=412)
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-a0b0bf68-0d9d-45ee-96ec-2f180cadee3c.png?width=206&height=412)