Last night I was playing music thur my Iphone thru my AUX input. When I recieveced a call. I decieded to to pick up the call with the phone still plug in to the AUX. to see what would happen. I was able to hear the caller thru the car speakers and the caller could hear me. Has anyone tried this before? and if so is the Iphone mic pick up my voice or is it the Onstar mic? The only reason i ask about the Onstar mic is beacuse of the Iphone headphone have a mic built in. O ya had the Iphone in the dashboard storage with the door open. ???