As stupid as it may seem to some, I have a strong personal preference for OEM radios and controls. So much so that I went through the trouble and expense of swapping out my factory head unit and Bose amp for a Bose LUX/TNR Nav head unit and amp from an Escalade. A few years ago I did swap the factory XM module for an iSimple module that allows me to stream bluetooth audio, but I have recently had a desire to have handsfree bluetooth phone calls. A quick google search pulled up a video on youtube showing how to add this capability using OEM parts. It isn't cheap, but it is the only option I have found. The module has been discontinued, but the dealer I use for parts said there are plenty in stock in Michigan. I'm hoping the install is fairly straightforward. I will keep this post updated with my results. Here's the video for those interested.