1. Find "SIM card lock"
Slide your finger downwards starting from the top of the screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-50b33a31-e9dc-4d3f-9df7-22e8fac8d8d4.png?width=200&height=400)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-54e0fb5f-9a57-4ba0-a4ac-1c145c6837ff.png?width=200&height=400)
Press Security & location.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-70b40c24-f32b-4fa0-9efa-6aa754111bb1.png?width=200&height=400)
Press SIM card lock.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-dd743926-f5a3-4641-abda-496a65c6bd7b.png?width=200&height=400)
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-8af6e476-e1fd-4b57-9464-40154dc1f5d8.png?width=200&height=400)
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-fa8c3408-4992-45b8-ab42-9b375b19864e.png?width=200&height=400)
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-8af6e476-e1fd-4b57-9464-40154dc1f5d8.png?width=200&height=400)