LG Stylo 3 PLUS User Manual page 8

Scan only one finger for each registration. Scanning more than one
finger may affect fingerprint registration and recognition.
The device may generate static electricity if the surrounding air is dry.
If the surrounding air is dry, avoid scanning fingerprints, or touch a
metallic object, such as coin or key, to remove static electricity before
scanning fingerprints.
Registering fingerprints
You can register and save your fingerprint on the device to use fingerprint
identification.
1
Tap Settings General Fingerprints & security Fingerprints.
This feature is available when the screen lock is set.
Lock the device with a Knock Code, Pattern, PIN or Password.
If the screen lock is not set, configure the lock screen by following the
on-screen instructions. See
2
Locate the Power/Lock key on the back of the device and gently put
your finger on it to register the fingerprint.
Ensure that your fingertip covers the entire surface of the sensor on the
Power/Lock key.
Custom-designed Features
Setting a screen lock settings for details.
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