I want your faulty electronics
I've never had an issue with any bluetooth unit in a B8.
Does the same thing happen on a different bluetooth unit or different phone in your car?
Got a 3.5mm aux input on the stereo?
Use the headphone jack from the phone and plug it directly in to the head unit.
Sound from the car speakers and uses the mic in the phone. Seems to work ok on a couple of cars i tested it on.
RNS-d A8 and A4 fitment for sale. Spare parts also available
A4 B5 Double Din Parts for sale.