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-8a6dbeab-932e-4543-a802-c718f42d1127.png?width=212&height=434)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-331afb2f-e0d0-45b8-8618-96dc62de958e.png?width=212&height=434)
Press Security & location.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-9a66f0a4-1946-4f10-895d-c173ef23ba6c.png?width=212&height=434)
Press Advanced.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-a56592f5-82e0-40d2-a351-d95bf9357125.png?width=212&height=434)
Press SIM card lock.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-14abb1f4-6799-40db-9f99-b88e61c109d1.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-81812b10-f674-4fb9-8180-abab2e258cc3.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-739a7a70-9a78-4c2f-bede-520b30c1f376.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-81812b10-f674-4fb9-8180-abab2e258cc3.png?width=212&height=434)