So this one time I was playing with the game Flow (it sometimes crashes the phone if the board size is too big). It was working fine. Then I minimized the app. Several minutes later I got a call, everything is still normal. Several minutes after the call though, I discovered that my phone has shut itself down. I tried to power it on but then it's stuck on the SAMSUNG screen, forever looping the animation. I looked up for help and they say to flash the thing. The problem is I don't know the exact version of the ROM needed. Moreover, I tried flashing once with Odin and thru the install screen, at the end it said "can't mount" something, I forgot. I never played around with the system before, I think. The only one time I tinkered around with it was to be able to move apps freely to SDcard, and it was quite long ago. So any help with this?