1. Find "SIM card lock"
Slide two fingers downwards starting from the top of the screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-39442f38-08bb-4e83-9c2d-b0470f72b99d.png?width=202&height=448)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-f0b654c7-d647-40e7-86e9-f2e39c869f16.png?width=202&height=448)
Press Security.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-76f598b1-ad7a-47c3-b3d1-92552ff1242f.png?width=202&height=448)
Press SIM card lock.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-12b0777a-50c5-4bce-94bd-d054341ae4b7.png?width=202&height=448)
2. Turn use of PIN on or off
Press the required SIM.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-3fafd568-c415-40fd-aab4-1d4178db3ad6.png?width=202&height=448)
Press the indicator next to "Lock SIM Card" to turn the function on or off.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-6a1d9311-7201-4311-8f29-216e410f31ab.png?width=202&height=448)
Key in your PIN and press the confirm icon.
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-3269a4b4-6bcc-48ab-a642-38457552f8ba.png?width=202&height=448)
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-6a1d9311-7201-4311-8f29-216e410f31ab.png?width=202&height=448)