My Windows Mango 7.5 phone works fine with Sync. My old Windows 6 phone worked great too. I believe Sync was built for phones that meet the Bluetooth standards and there are some phone manufacturers that make up their own proprietary standards, therefor they may not work. Windows Mango 7.5 phone also works great with my Sony Bluetooth radio in my other car and my wife’s BMW Bluetooth. No problems! Pretty cool to get a Facebook message or other text message and by handsfree voice dictate a response that is converted to text and send it handsfree. Even Wozniak thinks it is a thing of beauty http://blogs.computerworld.com/20099...help_design_it
All that said, I think Windows stuff is more for the younger generation that like cool tech. It just does everything so much faster and easier without getting all wound up using different applications. Like take a picture without turning on your phone and from the same screen post it to Facebook, etc.