Contact your wireless service provider to learn whether they support conference calls and how many participants you can include.
Place a call to the first participant.
When you’re connected, tap Add call .
The Phone application opens. Enter a phone number, then tap the Call Key .
Tap the keys on the dialpad to manually enter a phone number.
Tap the Contacts tab to select a number from your Contacts list.
Tap the Call log tab to select an entry in your Call log.
Tap the Favorites tab to select one of your Favorites.
Tap a Frequent list entry to enter it.
After you’re connected, tap Merge call . The participant is added to the conference call.
Tap here to merge call.