LG MG101 User Manual page 27

In call Menu
2-7 Putting a Member of a Multiparty Call on Hold
To place one selected caller (whose number is currently displayed
on-screen) of a multiparty call on hold, select [Options] then
Multiparty / Exclude.
2-8 A Private Call in a Multiparty Call
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 Multiparty / Private to put all the other callers on
hold.
2-9 Ending a Multiparty Call
The currently displayed caller of a multiparty call can be
disconnected by pressing the [End] key. To end a multiparty
call, press [Options] then select Multiparty / End multiparty.
Selecting [Options] then Multiparty / End all, will end all the
active and held calls.
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MG101 User Guide