I had a f90bt unit installed at my local Best Buy, they did not install the audio jacks for the ipod. I took out the unit not disconnecting anything, but just to hook up the ipod adapter. We went on a short trip and I used the navi and noticed that once it got to 2:00 and 1:00 marks the songs went out for a second. I started to realize, "hey, isn't there a voice that's on these?" I messed around with it some more and when I make a call the receiving end can hear me, but I can't hear the voice of the caller nor the dial when I'm calling someone. So there's ipod, fm, dvd working fine, but no nav