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-a1845d8c-4ad5-42e4-b086-17ceeb9337ad.png?width=214&height=380)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-0fe06809-4a1a-4447-94a8-afd643e6354f.png?width=214&height=380)
Press Security & location.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-e7dd0c52-da1e-4926-9348-e4f9889e5439.png?width=214&height=380)
Press SIM card lock.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-5cf86b8a-6f11-4bbd-af9c-788eaabffdb8.png?width=214&height=380)
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-90ef87fb-12cb-4f98-b97f-72273656647f.png?width=214&height=380)
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-4629f969-e30a-4081-be31-6221f993f94a.png?width=214&height=380)
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-90ef87fb-12cb-4f98-b97f-72273656647f.png?width=214&height=380)