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-0bc70fc1-efab-4736-9fda-976e9bff0997.png?width=202&height=358)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-2769db16-c423-475e-bd2c-44abd472ffff.png?width=202&height=358)
Press Security & location.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-95c25792-3028-48d8-9b65-dd8e1923f37f.png?width=202&height=358)
Press SIM card lock.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-132a8cfd-9727-4582-b30c-e787d5d94a0f.png?width=202&height=358)
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-8454c9c9-0d14-41f3-ac76-0a2ea14b8df6.png?width=202&height=358)
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-afc28bc7-3510-4e5f-a9a6-893abce7859a.png?width=202&height=358)
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-8454c9c9-0d14-41f3-ac76-0a2ea14b8df6.png?width=202&height=358)