Samsung SM-G970F User Manual page 210

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Settings
Registering your face
For better face registration, register your face indoors and out of direct sunlight.
On the Settings screen, tap Biometrics and security → Face recognition.
1
2
Unlock the screen using the preset screen lock method.
If you have not set a screen lock method, create one.
3
Read the on-screen instructions and tap Continue.
4
Select whether you are wearing glasses or not and tap Continue.
5
Hold the device with the screen facing towards you and look at the screen.
6
Position your face inside the frame on the screen.
The camera will scan your face.
When the useful face recognition screen appears, turn on a switch to activate a feature
and tap OK.
If unlocking the screen with your face is not working properly, tap Remove face data
to remove your registered face and register your face again.
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