Windows computer needed
Latest Odin can Google it and download should be 3.13.1 or 3.14.1
Latest firmware from sammobile download , which carrier we might have here ?
You will extract files for Odin once download with 7zip and will do same for firmware with 7zip .
There will be 4 files after you extract the firmware
BL
AP
CP
CSC
Each of those files will go in Odin when you open to the corresponding slots
BL
AP
CP
CSC USE HOME CSC FIILE TO SAVE DATA
Home data slot dont put nothing
connect your phone with cable to computer , once the files are in its slots hit start, once done you'll see pass in Odin and it will reboot