LG K20 Plus User Manual page 10

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 secured lock is enabled.
- Lock the device with a Knock Code, Pattern, PIN, or Password.
If the screen lock is not enabled, set it up 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.
Gently press the Power/Lock key so that the sensor can recognize
your fingerprint. If you press the Power/Lock key with an excessive
force, the screen lock function may start or the screen may be
turned off.
Ensure that your fingertip covers the entire surface of the sensor of
the Power/Lock key.
Custom-designed Features
Setting a screen lock for details.
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