YEAH baby! My Demo will be here today!

I am pretty sure that with the new OTA Radio that was recently released, it fixed the whole muting of the Mic while you have your phone plugged into your car stereo. I just tested my phone and it worked great!

Worst case scenario, I was told there is a workaround to this as well. If yours still is muting the Mics on a phone call, go to Settings>Call>TTY mode. Change this to "TTY VCO." This should unmute the mics when on a phone call with something plugged into the headphone jack.