I had the same issue. I use a Blue Parrot BT-250, for driving a truck, and 6 feet away it drops out. My OG Droid, I could leave the phone in the truck, and walk to the back of the trailers, 50' plus, and it would only break up if I walked behind the trailers.
Returned the phone, but now I believe that my OG has had it final drop. Not sure what I'm going to do...