1.Make a call.
2.Tap Add Call and dial in the second phone number. The first call recipient will be placed on hold
3.Tap Merge Calls to connect both parties together
4.Repeat steps two and three to add
iPhone is actually a two-line phone, and one of the available lines can be involved in a conference call.
If you want to drop a call from a conference, tap Conference and then tap the red circle with the little picture of the phone in it that appears next to the call. Tap End Call to make that caller go bye-bye.
You can speak privately (one-on-one) with one of the callers in a conference. Tap Conference, and then tap Private next to the caller you want to go hush-hush with. Tap Merge Calls to bring the caller back into the Conference so everyone can hear him or her.
When you’re done, you can remove participants one by one from the participants screen with the “End” button, or hang up on everybody all at once by tapping the normal red “Hang Up” button at the bottom of the call screen.