How Do you know this is flashing problem.
- if your phone is dead or freezing no only show Samsung logo on screen.
- Phone is auto restart all hardware is okay but phone is auto restart.
- when open any option device is auto restart freezing.
- automatic download application, games etc.
- auto make call
no any others hardware problem. don't flash your device if your device battery is low. it's risk for your device. if flash is not complete and phone is turn off device will be dead.