![Xiaomi Mi 11 Ultra](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-d16e6071-bdca-4c83-9b2f-964a5cd1b820.png?width=150&height=320)
Xiaomi Mi 11 Ultra
Android 11.0
1. Find "Privacy"
Press Settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-cc48b4d6-a20a-4d8f-b65d-4edac1e567cf.png?width=206&height=462)
Press Passwords & security.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-58ef6833-3ffc-4599-b038-eff7d79653c3.png?width=206&height=462)
Press Privacy.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-3a2e9975-aa4b-4655-b584-2359cb761c83.png?width=206&height=462)
2. Turn use of PIN on or off
Press the required SIM.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-fda585e8-5e4f-4e11-9656-8c67659a82ff.png?width=206&height=462)
Press the indicator next to "Lock SIM card" to turn the function on or off.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-32149655-7bfc-4101-9e40-3a211c758328.png?width=206&height=462)
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. 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-4783e0ce-39d2-4e99-91bf-3026dc855cea.png?width=206&height=462)
3. Return to the home screen
Press the Home key to return to the home screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-32149655-7bfc-4101-9e40-3a211c758328.png?width=206&height=462)