Hello, I'm having trouble taking phone calls on my Mesmerize when I'm in the car. I'm using the headphones jack to play sound over the car speakers. When making/receiving a call I can hear them, they can't hear me. I've picked up in other threads, that this is because the phone thinks I've plugged in a headset with a mic. However, plugging in a mic'ed headset simply isn't an option for me. Is there an app, or something that will allow me to use speakerphone while headphones are plugged in? Seems like such an obvious thing to have. How are people making/receiving calls when listening to music, etc? Thanks.