before you do that you should unroot your D2
I haven't experienced any call quality issues on my Incredible either. I've owned both phones, and I don't recall any discernible differences. Although, I noticed the Droid 2 and Droid X seem to have a wider bluetooth range. I can travel far from either of those devices, and still hold a crystal clear reception, where as my Incredible would start to take on static if moved more than 10-15 feet away.FWIW, my call quality has never been bad.