LG G5400 User Manual page 114

To place one selected caller (whose number is currently displayed
on-screen) of a multiparty call on hold, select <[Options] then
.
To have a private call with one caller of a multiparty call, display the
number of the caller you wish to talk to on the screen, then select
<[Options] and
to put all the other callers on
hold.
The currently displayed caller of a multiparty call can be
disconnected by pressing the E [End] key. To end a multiparty
call, press <[Options] then select
multiparty.
Selecting <[Options] then
, will end all the
active and held calls.
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