I have a AVIC-X910BT unit and have my cell phone setup on the Bluetooth. When I have an incoming call or when I am talking on a current call and I want to just use my cell rather than the Bluetooth in mid stream, how do I do it? I sometimes want a private conversation, while others are in the car, but my cell is setup and picks up right away on the 910BT (which is great in most cases)...

You have to switch the output on the phone. There is no privacy feature on Pioneer units.

To do this on most phones all you do it click the OPTIONS or SETTINGS key (while on an active call) and select "Send Audio to Phone" or "Transfer to Handset" or something similar