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-c888e151-6fe2-41dc-86db-61fd12e0a225.png?width=182&height=428)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-28abe10b-81d1-41aa-a802-bf17beddab94.png?width=182&height=428)
Press Security.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-6f222803-1532-4523-a8e2-c9be5f3d3463.png?width=182&height=428)
Press SIM card lock.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-ef669722-a99e-43cf-8766-d12531debfae.png?width=182&height=428)
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-bde81596-e02f-4833-adc7-3df316fef1ac.png?width=182&height=428)
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-65df73f6-9363-4d6e-a372-864b9977aadb.png?width=182&height=428)
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-bde81596-e02f-4833-adc7-3df316fef1ac.png?width=182&height=428)