LG VS660 - Manual (Page 96)

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To set up a conference call
Contact your wireless service provider to learn whether they
support conference calls and how many participants you can
include.
1. Place a call to the first participant.
2. When you're connected, touch Contacts or Dialpad .
Touch Contacts to search for a contact to call. Touch Dialpad
to open the dialpad and introduce a number to dial.
The first participant is put on hold and you're prompted to
dial the second caller.
3. After you're connected, touch the Merge calls button .
The participant is added to the conference call.
Placing and Receiving Calls
Touch to swap calls.
Touch to end a conference call
and disconnect all callers.