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-ee9bc0a1-843c-46fa-9a48-5d569c4d9ed6.png?width=198&height=440)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-e2f8b409-302a-44ba-952d-7a8c6ee04c88.png?width=198&height=440)
Press Security.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-06a4d859-5066-4656-9c34-c49910ecc205.png?width=198&height=440)
Press Advanced.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-7a8b71ff-d887-4e8f-b492-32023e1e6885.png?width=198&height=440)
Press SIM card lock.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-43b81be1-d7bf-487f-9605-6e73d51d091d.png?width=198&height=440)
2. Turn use of PIN on or off
Press the required SIM.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-ac8e9cec-d4af-4fda-b281-4e4ff093dd9e.png?width=198&height=440)
Press the indicator next to "Lock SIM card" to turn the function on or off.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-ac8e9cec-d4af-4fda-b281-4e4ff093dd9e.png?width=198&height=440)
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-025b9fa7-27f3-4e07-a55c-7059443900ce.png?width=198&height=440)
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-ac8e9cec-d4af-4fda-b281-4e4ff093dd9e.png?width=198&height=440)