From the Phone screen, select your active call.
Press Conf. The active call goes on hold.
Dial the telephone number, or call the person from Contacts or History list.
When the person answers, press Join to add the person to the existing call.
To add another party to the conference call, press Add and repeat Steps 3 to 4.
Press Conf to establish a conference, or press Add if you are already in a conference. The active call goes on hold.
Select the call on hold that you want to add to the conference.
Press Resume to take the call off hold.
Press Join to add the person to the conference call.
Hold: Places entire conference on hold.
Add: Allows additional calls to be added to conference.
Drop: The last person connected to the conference call will be the first person - to be disconnected when you press Drop.
More: Additional keys if available show up here.