When it arrived from ebay, I put it to charge, and it was good, but later it started to turn off, and turn on itself. Suddenly it didn't want to start at all. I tried factory reset, but it does nothing, like it is dead. Then my seller sent me file to install that on tablet, it was vortex flash 18.104.22.168(something like that). I did it and it worked, I charged it , but that happened again today, it was resetting, until I connected it to computer, I was holding "power" + "menu", and connected other end of usb cable to my tablet. It showed me the screen with factory reset option, but I didnt know how to scroll to the factory reset, so selected was reboot, and I pressed "menu". It did reboot, and it is working now.Once after that it just couldn't start android , there was just vimicro, and it started again with vimicro, but then it ran the system. Please tell me what you think. I can send it back to my seller to friday, not later, so shall I do it or not?