1. Find "SIM PIN"
Press Settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-dc4e4781-c3a3-4a17-9dc6-a1a91659af50.png?width=206&height=448)
Press Mobile Data.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-909a352a-806c-4ed9-a4d1-86bbdce69186.png?width=206&height=448)
Press SIM PIN.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-72471c63-d713-47b0-b68d-580f4d16fa45.png?width=206&height=448)
2. Turn use of PIN on or off
Press the indicator next to "SIM PIN" to turn the function on or off.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-1068056c-bced-4a15-9d82-5be7e8b1c88b.png?width=206&height=448)
Key in your PIN and press Done.
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. You can get the PUK by calling customer services on 191 from a Vodafone mobile phone. If you're using a land line, you need to dial 03333 040 191. 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/7151223-f-30725073-a773-404d-bd42-88e468334a4b.png?width=206&height=448)
3. Return to the home screen
Slide your finger upwards starting from the bottom of the screen to return to the home screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-1068056c-bced-4a15-9d82-5be7e8b1c88b.png?width=206&height=448)