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-5452e51d-155b-45b5-8bdd-32ec709ec475.png?width=220&height=390)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-cd1cc86c-dd29-49c0-8f43-94788483bb1b.png?width=220&height=390)
Press Security & location.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-4fc9e3e8-a615-4038-a452-a514a8491108.png?width=220&height=390)
Press SIM card lock.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-8a235a95-c742-45ea-9786-0dba2549118d.png?width=220&height=390)
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-66d518f3-58b5-41a4-b959-a692322bfd0e.png?width=220&height=390)
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-878f9642-84fc-4077-a3b3-8594470885df.png?width=220&height=390)
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-b7082e71-5570-4ee8-bbe4-6e93c852e37b.png?width=220&height=390)