1. Find "More security settings"
Press Settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7110324-f-f713e7eb-7204-4be0-a740-9ebb8930aaea.png?width=206&height=456)
Press Passwords & security.
![](http://wmstatic.global.ssl.fastly.net/ml/7110324-f-fa5e99c2-b43e-4935-ab17-a0739bc94e95.png?width=206&height=456)
Press Privacy.
![](http://wmstatic.global.ssl.fastly.net/ml/7110324-f-f81fd3d7-dce3-4325-976c-f9479262bab3.png?width=206&height=456)
Press More security settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7110324-f-01b033d5-a0cc-4f5c-ba14-b552801d2b58.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/7110324-f-633221e0-44c5-43a2-b188-fa4941c9f04c.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/7110324-f-47c2ddeb-b728-4ec9-a835-64c34ccb1da8.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/7110324-f-fb9ae4c8-c341-490f-bcbd-73df2d960572.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/7110324-f-47c2ddeb-b728-4ec9-a835-64c34ccb1da8.png?width=206&height=456)