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, touch Add Call .
The Phone application opens. Enter a phone number, then touch the Call Key .
Touch the keys on the dialpad to manually enter a phone number.
Touch the Contacts tab to select a number from your Contacts list.
Touch the Call log tab to select an entry in your Call log.
Touch the Groups tab to select one of your Favorites.
Touch a Frequent list entry to enter it.
After you’re connected, touch the Merge calls . The participant is added to the conference call.