Hello guys I need help im trying to fix my phone one week and still no help, I upgradet my android 6.0 and I got camera fail so I downgrade it to 5.0 with no back up, so stupid to do. I lose my imei code now I got 004 imei code I tryed everything (odin, octopus, firmware change ...) still nothing can it be fixed somehow. My phone is Samsung Galaxy S5 SM-G900H help ! Thanks