Here Drive plus for Windows Phone 8.1 now supports using bluetooth to give directions via my car's Bluetooth phone connector (BMW e46 factory Bluetooth interface). The interface works nicely for phone calls, but for navigation, I only need the normal phone speaker. I have not found an option to switch it back to the speaker. In my case, the first tenth of a second are cut off and the radio is interrupted. Anybody have an idea how to switch it back to the normal (through the phone speakers) settings?