1. Find "SIM card lock"
Slide your finger downwards starting from the top of the screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-7c1213bb-0337-4321-9317-69f7f0e4825c.png?width=202&height=404)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-cb430479-9e13-42c4-9095-2999a8a92553.png?width=202&height=404)
Press Lock screen & security.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-554c21bb-3893-4da3-8dfb-d2116a559737.png?width=202&height=404)
Press SIM card lock.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-afed63da-f3f9-4bb3-81ce-d64c3ca9d192.png?width=202&height=404)
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-6d76e0ed-2b6c-46a7-8600-beabe5c8d7cb.png?width=202&height=404)
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-c8ac8c16-8c39-4f4f-a1cf-c8133633a7d9.png?width=202&height=404)
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-192ddbe0-44cd-44c6-b01e-2bdd1155ccc9.png?width=202&height=404)