1. Find "Device Password"
Slide your finger downwards starting from the top of the screen.
Press Security and Privacy.
2. Create phone lock code
Press the indicator next to "Device Password" to turn on the function.
Press Password and key in the required phone lock code.
Press Confirm password and key in the phone lock code again.
3. Turn off use of phone lock code
Press the indicator next to "Device Password" to turn off the function.
Key in the phone lock code and press OK.
4. Return to the home screen
Slide your finger upwards starting from the bottom of the screen to return to the home screen.