Hey there, over the past week I've noticed 3 instances where my HTC Hero just spontaneously switches off.. Screen black, buttons not lighted up. First time, I was editing the Calendar, second time I was viewing my photo album. Most recently, I had the phone in my pocket with music player playing and the phone just stopped working. Battery level wasnt low and I had to remove the battery and reinsert it to get the phone going again for each of those times. The phone might have crashed but idk, this never happened before the past few days (Ive been using it for 2.5 months now)