LG VS980 - Manual (Page 67)

65 Calls
Instant list icon on the right side of the screen to view the entire list of
matching entries. Tap the Cancel button to close the list.
Selecting an Instant list entry
Tap an entry in the Instant list to insert it on the dialpad and tap the Call
Key
to dial it.
Options During a Call
Bluetooth Button
Tap here to switch between a
Bluetooth device and the phone.
The light bar illuminates to indicate
that the call is using a Bluetooth
device. The button is greyed out
when there is no Bluetooth device
available.
Mute Button
Tap here to mute the microphone
during a call. The light bar
illuminates when the microphone
is muted.
Speaker Button
Tap here to turn the speakerphone
on or off. The light bar illuminates
when it's on.
To mute the microphone
 Tap the Mute button on the Call screen.
The light bar on the Mute button illuminates to indicate that the
microphone is muted.
When viewing the Call screen, you can unmute the microphone by
tapping the Mute button again.
The microphone is unmuted automatically when the call ends.
To turn the speakerphone on or off
 Tap the Speaker button on the Call screen.
The light bar on the Speaker button illuminates to indicate that the
speakerphone is on.