LG C3300 Benutzerhandbuch Seite 170

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.
C3300 User Guide