1. Tap the phone icon
2. Make a call to the first recipient
3. Once the first call connects, tap Add call.
4. Dial the second number
5. Tap Merge calls.
6. If one of the people you called disconnects during your call, you and the remaining caller will stay connected. If you initiated the call and are the first to hang up, all callers are disconnected.
Press end to hang up when done
Conference in another call.
Once you have one caller, select Menu > dial second number, then merge calls.