[Galaxy S8/S8+]Is it true that face recognition be unlocked by a printed photograph?
When using face recognition to unlock your device, you phone could be
unlocked by someone or something that looks like your image. As Face recognition
is less secure than Pattern, Pin, or Password, we recommend to use the Iris recognition,
Fingerprint recognition, Pattern, Pin, or Password to lock the device.
Additionally if you use your face as a screen lock method, your face cannot be used to
unlock the screen when turning on the device. To use the device, you must unlock the screen
using a pattern, PIN, or password you set when registering the face.
Be careful not to forget your pattern, PIN, or password.
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