Download Odin Zip -
Click the buttons in Odin to match your extracted firmware files: BL: Bootloader file AP: System/Main firmware (takes the longest to load) CP: Modem/Radio file
Open the folder and right-click Odin3.exe -> Run as Administrator . Enter Download Mode: Power off your phone. Hold Volume Down + Bixby (or Home) + Power (older models). Download Odin zip
Or connect to PC while holding (newer models). Click the buttons in Odin to match your
Regional file (use HOME_CSC to keep data; CSC for a clean wipe) fixing a boot loop
Right-click the downloaded Odin file and select "Extract All."
(e.g., fixing a boot loop, updating manually, or rooting)