This is my second HTC X one in the last 2 weeks. I returned the first one after 2 days because of battery issues. Last night at around 1AM I noticed my phone had shut off completely by it's self (the first one did this also right before it had battery issues). It took a few attempts to get the phone to turn back on. When I went to sleep at 3am I had over 50% battery...when I woke up the phone was completely dead (it was not on a charger). I plugged it in to my wall charger and let it juice up for a few minutes before turning it on. When the phone turned on I looked at the battery usage under the settings. Over the course of the night the battery had dropped maybe 8% and than all of a sudden it went from 50% to 0% in a matter of mins if not seconds. Phone seems to be fine now. Is this just a common problem with this phone?