1. Find "More security settings"
Press Settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7090424-f-91fa65c7-2473-4c46-8dc6-b04333c20c3a.png?width=206&height=456)
Press Passwords & security.
![](http://wmstatic.global.ssl.fastly.net/ml/7090424-f-6f39e1c7-bcc4-4e80-8448-9118ec0cf71e.png?width=206&height=456)
Press Privacy.
![](http://wmstatic.global.ssl.fastly.net/ml/7090424-f-edee8b95-5a6f-448e-adb1-b0085b5d6d00.png?width=206&height=456)
Press More security settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7090424-f-744f4c55-6de7-4b92-95ed-1108ebcf97d1.png?width=206&height=456)
2. Turn use of PIN on or off
Press the name of the SIM.
![](http://wmstatic.global.ssl.fastly.net/ml/7090424-f-107b70bd-e78c-4823-943a-9ee86d4f8ecd.png?width=206&height=456)
Press the indicator next to "Lock SIM card" to turn the function on or off.
![](http://wmstatic.global.ssl.fastly.net/ml/7090424-f-c1411001-7f8f-422d-a74d-724545a166b3.png?width=206&height=456)
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/7090424-f-fdade54c-38ec-4b90-8a54-769aa00ccdca.png?width=206&height=456)
3. Return to the home screen
Press the Home key to return to the home screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7090424-f-c1411001-7f8f-422d-a74d-724545a166b3.png?width=206&height=456)