I read many posts online about how to fix HTC One M9 frozen situation. None of them addressed my problem. No one seemed to have a phone that freezes to the point that no possible way to power it off, restart, unlocking the phone with password, or tapping the keypads to get any response. My phone is only six months old. Now it is a piece of useless junk because it has all what I just described. Everyone who gave advice suggested power off by pressing the power key and the volume key. Mine did not respond. People also suggested to press this key for this, that key for that. My key does not do a think. I am going to throw away the phone. But I still would like to know if anyone has heard of such a situation and has a solution.