Hello i was have issue with my deivce and i searched a lot to solve it on internet some of people just sold their phone to this problem and some replace the motherboard
Finally i was able to solve it the problem is that you have kg state locked and when you try to flash any file it give this message: all binaries are not allowed to be flashed due to kg locked even you can't flash stock rom like image
requirement :
1- usb cable
2- pit file for your deivce
3- combination rom for you device
So How to solve :
1- get pit file for your device
2- open odin go to pit tab and and select pit file
3- go to options tab and uncheck auto reboot
4- press start when finish go to recovery this is important
5- in recovery menu select reboot to bootloader
6- flash combination rom
7- go to settings check oem options from developer options
8- enjoy your problem is solved :fingers-crossed:
Don't Forget to hit thanks

Finally i was able to solve it the problem is that you have kg state locked and when you try to flash any file it give this message: all binaries are not allowed to be flashed due to kg locked even you can't flash stock rom like image

requirement :
1- usb cable
2- pit file for your deivce
3- combination rom for you device
So How to solve :
1- get pit file for your device
2- open odin go to pit tab and and select pit file
3- go to options tab and uncheck auto reboot
4- press start when finish go to recovery this is important
5- in recovery menu select reboot to bootloader
6- flash combination rom
7- go to settings check oem options from developer options
8- enjoy your problem is solved :fingers-crossed:
Don't Forget to hit thanks
Last edited: