Phone is muted...No one can hear me when I am calling, or answering a call. I can hear them fine. Phone shows "muted"?? How do you "un" mute?

Receiving Calls
1. To answer a call, touch or open the slide.
 If the slide is closed, simply slide it up.
 If the slide is closed, press the Voice
Commands key twice, then touch .
 If the slide is open and the touch buttons are
lit, touch .
NOTE If you touch Left Soft Key [Quiet] while the
phone is ringing, the ringing or vibration is muted
for that call.
NOTE If you touch Right Soft Key [Ignore] while the
phone is ringing, the call will end.



Mute Function
The Mute Function prevents the transmission of
your voice to the caller. To quickly activate Mute
touch Left Soft Key [Mute], then to unmute
touch Left Soft Key [Unmute].

NOTE! while doing this you must call someone then while talking with him touch Left Soft Key [Unmute] to Unmute

Hope it help you out ^_^
try download the manual if you loose it
http://www.cellphones.ca/upload/manuals/lg-vx-8500-manual.pdf