And my advice for those who have a defective 8X that HTC won't fix (or a defective Lumia that Nokia won't fix, or a defective iPhone that Apple won't fix, or...) is to sue HTC in your local small claims court.
The court will charge around $50 for paperwork and to serve HTC at their US HQ.
Such notices tend to get attention pretty quickly, since they're served to legal counsel. This tells the company you're suing that you are serious about getting the problem resolved, and that they cannot shrug off your complaints.
It is very expensive for companies to participate in small claims litigation, since they have to typically hire an attorney locally to represent them (and spend hours preparing legal documents). This increases their costs WAY beyond the cost of replacing or repairing your defective phone, and most will settle to get the matter taken care of.
If they show up in court, it's unlikely that a judge will side with the company if the product is defective, and you can prove that you used it reasonably. He or she will probably order the company to "perform under the warranty of merchantability" and replace your defective device (or refund your replacement/purchase price, plus costs -- which is what you should sue for).
If the company doesn't show up, you'll win a default judgment, which should be reasonably easy to collect from a major corporate entity. Many states will revoke the business licenses (and right to sell devices) of companies who have outstanding unpaid judgments, so you'll likely receive a check in the mail upon your demand for payment (often served by the court). If they really persist in not paying, chances are that they have a bank account at a national bank with a branch in your state that the sheriff can garnish for the judgment owed -- or you could seize property (including a new phone).
I wish more people would consider small claims as an avenue for dealing with companies that are trying to shirk their duties -- it would make a major difference in getting relief and fixing serious problems, and would give companies an incentive to stay on the up-n-up.
Good luck!