Turn off your phone. Hold Volume Up + Volume Down while connecting it to a PC via USB. Once in the Warning screen, long-press Volume Up to enter the bootloader unlock menu and confirm.
The exact you see on Odin or your phone screen.
Tap Build Number 7 times until you see "Developer mode has been enabled."
Rooting is a high-level modification. To ensure a smooth process and avoid "bricking" your phone, complete these steps first: