Samsung SM-A920F User Manual page 199

Settings
Deleting the registered face data
You can delete face data that you have registered.
On the Settings screen, tap Biometrics and security → Face Recognition.
1
2
Unlock the screen using the preset screen lock method.
3
Tap Remove face data.
Once the registered face is deleted, all the related features will also be deactivated.
Unlocking the screen with your face
You can unlock the screen with your face instead of using a pattern, PIN, or password.
1 On the Settings screen, tap Biometrics and security → Face Recognition.
2
Unlock the screen using the preset screen lock method.
3
Tap the Face unlock switch to activate it.
If you want to reduce the possibility of recognising faces in photos or videos, tap the
Faster recognition switch to deactivate it. This may decrease the face recognition
speed.
4
On the locked screen, look at the screen.
When your face is recognised, you can unlock the screen without using any additional
screen lock method. If your face is not recognised, use the preset screen lock method.
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