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-cb4554cc-f1d2-4b41-b7db-2b4d785e436b.png?width=220&height=394)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-88396f5a-f90f-48f8-b3ec-1004b15f0b78.png?width=220&height=394)
Press Lock screen and security.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-7bf17975-de40-466f-9dfa-de684c5aac16.png?width=220&height=394)
Press Other security settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-0f2d85b6-b712-4fcf-8dba-cbfa4e7502ee.png?width=220&height=394)
Press Set up SIM card lock.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-535bae48-47b2-46a9-b718-06d31163dbc2.png?width=220&height=394)
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-749a6514-e9bd-4f9d-9e5b-23f73a0a419f.png?width=220&height=394)
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-c7f87f52-5b39-43d2-9874-ea5880d5d7c3.png?width=220&height=394)
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-749a6514-e9bd-4f9d-9e5b-23f73a0a419f.png?width=220&height=394)