You can use your iPhone to set up a conference call. You can merge up to five calls.

1. Make a call.
2. Tap add call, and make another call. The first call will be placed on hold. If you want, you can talk privately on the second line before merging the calls.
3. Tap merge calls. The calls are merged onto one line, and everyone can hear each other.
4. Repeat steps 2 and 3 to add more callers to the conference. You can merge up to five calls for a phone conference.
5. To add an incoming call to the conference, tap hold call + answer, and then tap merge calls.
6. To talk privately to one caller during the conference, tap conference and then tap private next to a call. Tap merge calls to return the caller to the conference.
7. To drop one caller from the conference, tap conference and then tap private next to a call. Then tap end call.