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-473f09b5-aa42-42e4-891d-23d0c20b945b.png?width=184&height=428)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-0e866170-586a-4886-b7a2-8593a1b2272f.png?width=184&height=428)
Press Security.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-1e3c359d-14cd-43bc-8c5f-80b446659f3b.png?width=184&height=428)
Press SIM card lock.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-82daa3c8-b416-46c9-b96e-802de5affbda.png?width=184&height=428)
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-0c2b23cd-e174-4621-a089-32072b35f58f.png?width=184&height=428)
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-2479e58a-34ea-4cfe-ad26-12604738e217.png?width=184&height=428)
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-0c2b23cd-e174-4621-a089-32072b35f58f.png?width=184&height=428)