Sry for being late i just downloaded the frimware from sam mobile or whatever website u got by cofirming model sane i downloaded tge ins version frimware and installed it with the help of odin for further detail search installing frimware in szmsung ...
I was facing the same problem so i updated my own i mean by flashing with pc i have the same model /ds unit i dont know these units are display sets or real one as i didnt find /ds unit information
