Find "Security & privacy"
Press Security & privacy.
Create phone lock code using a fingerprint
Press CHANGE UNLOCK METHOD.
Press the required phone lock code and follow the instructions on the screen to create an additional phone lock code.
Press New in-screen fingerprint.
Press ENROL FINGERPRINT and follow the instructions on the screen to create the phone lock code using your fingerprint.
Press the indicator next to the required settings to turn them on or off.
Press the Return key twice.
Turn off use of phone lock code
Press Lock screen password.
Press Disable lock screen password.
Key in the current phone lock code and press DISABLE.
Return to the home screen
Press the Home key to return to the home screen.