updating this just in case someone else had this same problem...
so after replacing the mic, same problem. i can hear the other end clearly, but they dont hear me whatsoever! finally contacted pioneer. hard resets, switching phones, plugging/unplugging, and 1 1/2 later, they determined that i had a faulty unit sent the unit back and got a new one two days later. installed new one and everything worked on the first try! yey! i hope this helps!