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-067f6283-d645-4db4-89cb-8f5c86ff6ebf.png?width=210&height=372)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-0dc53ecb-6a0f-4049-a545-b15928ecfed1.png?width=210&height=372)
Press Lock screen and security.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-5c06372d-e2c0-40ea-a364-6cb9a9a5cf1e.png?width=210&height=372)
Press Other security settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-861337de-9455-48a2-b5a8-758c37be72e7.png?width=210&height=372)
Press Set up SIM card lock.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-9e903955-c809-4eb4-a7e6-c4f0711279d9.png?width=210&height=372)
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-a34d3dc1-3522-437d-b33e-2462256baeeb.png?width=210&height=372)
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-cca229cb-de7b-4dab-a5d8-7b6b034707ae.png?width=210&height=372)
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-a34d3dc1-3522-437d-b33e-2462256baeeb.png?width=210&height=372)