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-829520a6-85af-4af4-8a29-1ba00b3d2297.png?width=198&height=440)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-f09a36f1-e2bc-43d4-b6a0-60fd60361bce.png?width=198&height=440)
Press Security.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-1b806410-be77-4525-88e0-6759899a892f.png?width=198&height=440)
Press Advanced.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-604ade6c-9c94-4232-9f76-4fb131bb2f41.png?width=198&height=440)
Press SIM card lock.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-8fa017a9-259d-49d4-8f7f-2b70ca6c7549.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-ef6532fe-2b03-4693-827a-ea355928c414.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-ef6532fe-2b03-4693-827a-ea355928c414.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-6f46aea1-6061-4e8a-a98e-1d1ecce40fc6.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-ef6532fe-2b03-4693-827a-ea355928c414.png?width=198&height=440)