Find "Security & location"
Slide two fingers downwards starting from the top of the screen.
Press Security & location.
Create phone lock code using a fingerprint
Press the required phone lock code and follow the instructions on the screen to create an additional phone lock code.
Press the required setting.
Follow the instructions on the screen to add your fingerprint.
Turn off use of phone lock code
Press Screen lock and key in the current phone lock code.
Return to the home screen
Press the Home key to return to the home screen.