
Samsung Galaxy Watch Active2 40mm
Every official firmware build for SM-R835FS, newest first: one row per build with all regions (CSC) that received it.
Box codes of SM-R835FS for different colors and markets. Firmware is chosen by the model code SM-R835FS and your region (CSC), not by the SKU.

SM-R835F

SM-R840N

SM-R930N

SM-R732

SM-R845U
You can find the firmware on the model: SM-R835FS page.
Yes, all firmware files for SM-R835FS are 100% official, original, and obtained directly from Samsung servers.
To flash SM-R835FS, you need to download the appropriate firmware, put your device into Download Mode, and use the Odin tool to load the BL, AP, CP, and CSC files.
Downgrading is only possible if the bootloader version (binary bit) of the old firmware matches the current one. Always check the binary version before flashing SM-R835FS.