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-7e693868-bd59-45bb-ac93-a593fa2145e1.png?width=204&height=432)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-9ce1efa9-5206-46a8-a447-338255c2a8c9.png?width=204&height=432)
Press Security & location.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-b5cf50c2-9259-4480-80f9-4f7d05314f97.png?width=204&height=432)
Press SIM card lock.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-d8b2adb9-349b-4a2f-8527-de0f29ec76bd.png?width=204&height=432)
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-0c681e99-42ce-492f-86ce-e6dc909438ea.png?width=204&height=432)
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-66e13d05-b8f1-43c5-af1a-1e34a31af46b.png?width=204&height=432)
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-0c681e99-42ce-492f-86ce-e6dc909438ea.png?width=204&height=432)