You might have a dud. My first 8x, the battery died out completely within 24 hours of having the phone. I say just take it back and get a new one. Your phone is way too new to have those issues
This definitely sounds like a hardware issue. Any software problems will be solved soon though with the Portico Update. WP8 is a very smooth OS so this behavior is odd.
That's no good Jfschleich! I know how important it is to have a reliable device! Are you still having difficulties? How often are you power cycling the device? Is there a specific task you are completing when this happens? Have you tried connecting it to the charger when this happens?
Follow Us on Twitter@VZWSupport