You can have a three-way conference phone call by adding an intercom friend to the mobile phone conversation.
1. During a mobile phone call, tap the Jog Dial to invite one of your intercom friends to the conversation.
2. To disconnect the intercom during a conference phone call, tap the Jog Dial.
3. To disconnect the mobile phone call during a conference phone call, press the Jog Dial for 2 seconds or tap the Phone Button.