LG 840G User Manual page 26

the second call by touching the Send Key .
Rejecting an Incoming Call
End Key or touching .
Muting the Microphone
You can mute the microphone during a call by touching
handset can be unmuted by touching again. When the handset is
muted, the caller cannot hear you, but you can still hear the caller.
Using the Speakerphone
You can use the integrated Speakerphone during a call by touching .
WARNING
while the speakerphone is enabled.
LG 840G | User Guide