HTC Opera User Manual page 55

Chapter  Contacts and Phone Calls 55
When you tap a participant while the conference call is in progress, you will see
these buttons:
To talk in private with the selected participant, tap the Private button (
). This
separates the participant from the conference call and puts the others on hold.
When you want to swap between the private call and the conference call, tap the
dim area that shows "On Hold".
or the End Call button at the bottom of
You can end the private call by tapping
the screen.
To end the conference call, add the private call back to the conference call first by
tapping the Join button ( ), and then tap End Call.