If you would like to set up a lock screen on your phone, start from the next step.
If you would like to change the SIM pin code, jump to step 10.
Make sure you have your Public SIM PIN before you start the guide.
2
Select Apps
3
Select Settings
4
Select Security
5
Select Set up screen lock
6
Select Pattern
7
Draw an unlock pattern and select Continue
8
Confirm your pattern and select Confirm
9
Your phone is now secure with a screen lock
10
To change the PIN for the SIM card, return to the Security menu and select Set up SIM card lock
11
Check the Lock SIM card checkbox and select Change SIM PIN