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-d0e3b1c0-01b8-444a-ace7-f98aae9b8879.png?width=212&height=434)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-5d67e67e-47c8-486d-8b87-2ec7d16b7324.png?width=212&height=434)
Press Lock screen and security.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-bd3b6dfe-e94b-4e86-a80b-0577bcc3f10e.png?width=212&height=434)
Press Other security settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-31086e02-dc04-42b3-8a7b-0aa3e70c6920.png?width=212&height=434)
Press Set up SIM card lock.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-9b95c777-8c71-468e-abff-9023e3551a7f.png?width=212&height=434)
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-4387cf48-1126-4122-ad6c-774e4ff845d7.png?width=212&height=434)
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-65f07fb1-d1ac-447d-b691-db02387497df.png?width=212&height=434)
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-4387cf48-1126-4122-ad6c-774e4ff845d7.png?width=212&height=434)