Appendix
146
Message
Possible causes
Possible corrective measures
Files do not
open
Unsupported file format
Check the supported file
formats.
The screen
does not turn
on when I
receive a call.
Proximity sensor problem
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.
No sound
Vibration mode
Check the settings status in
the sound menu to make sure
you are not in vibration or no
interruptions mode.
Hangs up or
freezes
Intermittent software
problem
If the screen freezes or the
phone does not respond when
you try to operate it, remove
the battery and reinsert it. Then
power the phone back on.
Alternatively, try to perform a
software update through the
website.
Summary of Contents for LG-M400F
Page 1: ...ENGLISH MFL00000000 1 0 www lg com USER GUIDE LG M400F ...
Page 18: ...Custom designed Features 01 ...
Page 34: ...Basic Functions 02 ...
Page 36: ...Basic Functions 35 Parts overview ...
Page 68: ...Useful Apps 03 ...
Page 116: ...Phone Settings 04 ...
Page 121: ...Phone Settings 120 ...
Page 141: ...Appendix 05 ...
Page 152: ......