Installing Samsung Firmware on Different Region Device
The Canadian variant, SM-G935W8, uses an Exynos SoC, and has a lightly locked-down (?) bootloader; the AT&amp;T one, SM-G935A, uses a Snapdragon SoC, and is heavily locked down, to the point 3rd-party development on it is near nonexistent.

Unless someone manages to work around the lockdown and port the Exynos firmware to fit the Snapdragon hardware, I'd say it's straight up impossible.