100% test this flash file you can fix your device any flashing related problem after complete flashing. before flash your device at first make sure your device don't have any hardware problem. if phone have any hardware problem you should fix it then flash your device.  when you see your smart phone is auto restart without any region. if you open any option device is only show Samsung logo on screen then stuck your device. if you open any application device is slow or freezing or any other flashing related problem you can fix it after flashing.  Download Link Here
{"Image Software": "Google"}