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-0e4dfb7a-39bf-4cb6-9660-9462966eaa92.png?width=204&height=362)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-e356c44c-6c39-459d-af9c-8d590186788d.png?width=204&height=362)
Press Security.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-65355105-37da-4e8a-9de9-41dc174f1798.png?width=204&height=362)
Press Set up SIM card lock.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-71a81eaa-25da-4bce-8abb-6ec38fc1800f.png?width=204&height=362)
2. Turn use of PIN on or off
Press Lock SIM card to turn the function on or off.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-1fb78ef3-f991-4316-b7ff-2b97d1703b1c.png?width=204&height=362)
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-621e7880-2293-453a-9142-f650bf48f544.png?width=204&height=362)
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-1fb78ef3-f991-4316-b7ff-2b97d1703b1c.png?width=204&height=362)