1. Find "Set up SIM card lock"
Slide your finger downwards starting from the top of the screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-dfed505a-0f13-42b2-a92b-ffbb1186e200.png?width=206&height=368)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-6d224c89-1053-4fd0-82eb-b0fd40c1cc6d.png?width=206&height=368)
Press Security.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-be87fdb3-44c4-4dca-bc29-1a9704fe27be.png?width=206&height=368)
Press Set up SIM card lock.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-fc6cbeec-45e0-408c-b216-15fdc2d14ab7.png?width=206&height=368)
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-c9484123-1260-43b0-b5f6-c314270d9dfc.png?width=206&height=368)
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-2fa9b9f5-9339-4a96-8d32-669b543ecff5.png?width=206&height=368)
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-c9484123-1260-43b0-b5f6-c314270d9dfc.png?width=206&height=368)