LG T-Mobile C1200 User Manual page 34

To place one selected caller (whose number is currently displayed on
the screen) of a multiparty call on hold, press the left soft key, then
select .
Using up/down navigation keys, you can scroll through the phone
numbers of the callers in a multiparty call.
To have a private call with one caller from a multiparty call, display
the number of the caller you wish to talk to on the screen, then press
the left soft key. Select to put all the other callers
on hold.
The currently displayed caller from a multiparty call can be
disconnected by pressing the key. To end a multiparty call,
press the left soft key, then select . After
pressing the left soft key, selecting will end all the
active and on-hold calls.
C1200 User Guide