Might be a false alarm.But i was playing around with my phone and changing language on it to download apps from other countries. But when I changed it back to Norwegian a windows showed up. Didn't read it, but it said "postpone" or "install", so choose install. And now im going through the same as my friend with an 8X went through today. First it turned off, some wheels spinning and now it says "almost done" and "migrating data". The excact same thing that happen to my friends 8x.