LG G4 User Manual page 284

Message
Impossible
to receive/
send SMS
& photos
Files do not
open
The screen
does not
turn on
when I
receive a
call.
No sound
Hangs up
or freezes
94
Possible causes
Memory full
Unsupported file
format
Proximity sensor
problem
Vibration mode
Intermittent
software problem
Possible corrective measures
Delete some messages from your
phone.
Check the supported file formats.
If you use a protection tape or case,
make sure it has not covered the area
around the proximity sensor. Make
sure that the area around the proximity
sensor is clean.
Check the settings status in the sound
menu to make sure you are not in
vibration or silent mode.
Try to perform a software update
through the website.
Troubleshooting