When then auxiliary is plugged in with my car stereo, I would typically use the speakers and the handset microphone for a cheap hands free alternative. With this phone it seems to disable the mic when anything is plugged into the auxiliary jack. ****EDIT**** After further testing, it would seem that is only the case in the phone app. So for all intensive purposes, this is an okay solution: http://www.bestbuy.com/site/Dynex%26%23153%3B+-+Microphone+Headset+for+Select+Music+Mobile+Phones/9535327.p?id=1218120537083&skuId=9535327&st=dynix%20microphone%20aux&cp=1&lp=1 In a perfect world, they will fix the phone application. Meanwhile, we can use this low cost alternative for our ghetto handsfree options =). The mic isn't perfect, but the person you are calling won't complain. You just come across a little muffled but not enough to care. I hope this helps someone keep the phone! It did me. And to keep HTC informed, I started a thread here yesterday: http://community.htc.com/na/htc-forums/android/f/107/t/10161.aspx I did the empty threat message hoping for a fast response, ignore that. I love this phone.