Is it possible to stream music via BT from a cell phone to my car speakers? I mean it doesn't work for me. But what I don't understand is that when I have an incoming call I hear my ringtone through the speakers but when I try to play the same ringtone directly from the music player on my cell phone I don't get any sound. I have a choice of switching the stream between the phone and BT when I switch it to phone it plays through the phone's speakers, when I switch back to BT I get nothing. Anybody know if this is possible?