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-3a1aa658-bdb6-4d01-ae2f-c5fb8ff4773c.png?width=210&height=458)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-7609ebc9-24f6-45e4-8fbf-59605f6be8a9.png?width=210&height=458)
Press Security.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-113d4875-7640-4237-bf7e-a88c8bdfd591.png?width=210&height=458)
Press SIM card lock.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-775fc9f2-27ba-4518-9aef-39a269f36948.png?width=210&height=458)
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-80c214b4-cf68-4909-b228-2cedd6c910e8.png?width=210&height=458)
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-75e3ca34-bcc1-4729-974c-18b5936ced4a.png?width=210&height=458)
3. Return to the home screen
Slide your finger upwards starting from the bottom of the screen to return to the home screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-80c214b4-cf68-4909-b228-2cedd6c910e8.png?width=210&height=458)