Somehow my car sound system was playing music from my iPhone which was surprising but sounded great (none of the music sucked), and I searched, at a stoplight, the phone number for a store I was heading to to make sure they had something I was looking for. I hear the ringing through the speakers, and hear, barely under the audio, the person talking. I tried to turn the system off, but still hear the music and the person trying to answer my call. I couldn't get the music to stop, and hit the red dot to kill the call. I had to redial the number after turning the Bluetooth setting off. That is the first time I've ever heard of that happening. Weird...