LG G5 ユーザーガイド

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Custom-designed Features
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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 QuickMemo+
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.