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-3df21d6c-8ad6-4e10-aba5-675fc9fbdf62.png?width=206&height=368)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-b0f7ca45-2176-42df-880c-15f069bfb2f6.png?width=206&height=368)
Press Security & location.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-4c2293ef-9b07-4a93-894e-f91d5ab456d4.png?width=206&height=368)
Press SIM card lock.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-f9db1094-3854-45a9-9232-ac7280a56028.png?width=206&height=368)
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-726607ee-ed40-481d-9d47-4ba57677ce2c.png?width=206&height=368)
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-d1e6d496-8417-42f6-b6ab-8d0b00f0b433.png?width=206&height=368)
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-726607ee-ed40-481d-9d47-4ba57677ce2c.png?width=206&height=368)