I have a Thailand Version Galaxy Note 8.0 (GT-N5100). It works good under AT&T for few months. Last night (sept 14, 2013), I was prompted for system update so as usual, I clicked OK and leave the device in my bag. After couple hours, I pulled out the device and it was off. I turned it on (battery level 84%) and got on facebook then again I placed it in my bag. About an hour later, i took it out trying to make call, the phone was off again!!! I try to press the power button but it won't turn on. I then try the power + volume button for 10 seconds, it then shows the samsung logo (as it's powering up) then suddenly it shut down. I kept on trying the power + volume button but no respond. I then try power + menu + volume button, it pop out the battery charging icon (showing empty) and the went DEAD. After that, no matter what keys i press and even trying to charge the phone, no respond, JUST DEAD and WON'T TURN ON or Charge!!!!! Is this the battery issue or firmware updates issue? Does Thai Version need different updates then the USA version???? PLEASE HELP, all my important notes and photos are in the device with no backup!!!! THANKS.