From my experience so far, I'm not sure even HTC can fix these phones. I have sent mine away as I had some strange pitting in the metal finish seemingly caused by my approved HTC flip case.
After sending some photos to HTC, they agreed to replace the case under warranty. They have had my phone 3 weeks now, and I am becoming increasingly frustrated with the response I am getting. Apparently there is only one "machine" that can repair these phones in the entire country.