So I barely activated my ZTE on the 8th of December, and was having nothing but trouble.. I did multiple Factory Resets and was still getting random reboots and constant lockups overnight... As many others have done, I went app happy, but all were from reputable sources, most with a rating of 1 Million downloads plus... this last time that I did a factory reset, I only installed 20 apps of the 30 I had previously, and again it locked up overnight, had to remove the battery in order for it to reboot... so I looked at my apps history and when I installed certain apps, and by process of elimination, I focused on two apps as being the culprits of my random lockups and reboots... USPS app and words with friends, I also suspected Facebook, so I left it off ... no reboots, and no lockups for close to 15 hours, so I installed Facebook again, but this time I disabled the sync feature and automatic updates... it's been 19 hours straight of no reboots or lockups... so I did some more research into the matter and found out that the green LED on the front flashes when you receive updates, and of course when my phone locks up, the green light is flashing, so now I am almost certain that my random lockups overnight are a direct result of automatic updates from Words With Friends, I haven't installed it yet, will wait a couple of days and then I'll install it normally leaving the automatic update notices enabled and see if it locks up again, then I'll know for sure.... just thought I'd share this with you... it was driving me freakin' NUTS!!!!!