LG X MACH, User Manual

Page: 136 / 244

Custom-designed Features 13
Fingerprint recognition
Fingerprint recognition overview
Register your fingerprint on your device first before using the fingerprint
recognition function.
You can use the fingerprint recognition function in the following cases:
• To unlock the screen
• To view the locked content in Gallery or Qu
When confirming a purchase or signing in to an app, identify yourself by
simply touching the fingerprint sensor.
• Your fingerprint never changes for your whole life, and everyone has a
unique fingerprint. Therefore, your fingerprint can be used by the device
for user identification. Very similar fingerprints from different users
may be recognised by the fingerprint sensor as the same fingerprint.
To enhance the device security, set the screen lock to a pattern, PIN or
password.
• If your fingerprint is unrecognised or if you forget the backup PIN,
bring your device to the nearest LG Customer Service Centre and both
register a fingerprint and create a new backup PIN.
Precautions for fingerprint recognition
Fingerprint recognition accuracy may decrease. To maximise recognition
accuracy, check the following before using the device.
• The device’s Power/Lock key has a fingerprint sensor. Ensure that
the Power/Lock key is not damaged by a metallic object, such as
coin or key.
• When water, dust or other foreign substance are on the Power/
Lock key or your finger, the fingerprint registration or recognition
may not work. Clean and dry your finger before having the
fingerprint recognised.
• A fingerprint may not be recognised properly if the surface of your
finger has a scar or is not smooth due to being soaked in water.