Anyone else set up their Thunderbolt with Ford Sync over USB connection? I am unable to get it to work. I get "HUBS NOT SUPPORTED" on the SYNC screen no matter what setting I use on the TB. Bluetooth works fine but the audio quality is horrible. This is why I'm trying to get USB to work.
I've had a similar issue and I haven't found a resolution to the problem. However, when connecting with bluetooth, the quality is much better if you turn the volume all the way up on your media device -- that way it's sending the most powerful signal to the car. Then control your audio volume through your car for best results. Hope this helps you until htc (or verizon) comes out with a fix to the problem.