1. Find "Lock screen and security"
Slide your finger downwards the display starting from the top edge of your mobile phone.
Press the settings icon.
Press Lock screen and security.
2. Create phone lock code using iris scanner
Press Iris Scanner.
Press the required setting and follow the instructions on the display to create an additional phone lock code.
Follow the instructions on the display to create the phone lock code using iris scanner.
3. Deactivate use of phone lock code
Press Screen lock type.
Key in the current phone lock code and press None.
4. Return to the Home screen
Press the home icon to end the session and return to the Home screen.