Samsung Gear S3 Frontier
The latest firmware for Samsung Gear S3 Frontier (SM-R765F) is R765FXXU2FUD1, released on May 9, 2021 for 1 region (CSC). Every official firmware build for SM-R765F, newest first: one row per build with all regions (CSC) that received it.
Each firmware build has its own page at https://samfirm.shop/build/{PDA}, where {PDA} is the build number from the list above. Example: https://samfirm.shop/build/R765FXXU2FUD1
The newest build, R765FXXU2FUD1, was released on May 9, 2021. No new build has appeared for 66 months, so regular updates for this model have most likely ended.
- One UI for Watch
· Check information on your watch at a quick glance. Updated graphics(motion, interface) delivers refreshed look
- Watch faces
· You can now download new designs of watch faces
- Quick panel
· Now supports additional pages to allow quick access to setting control
- Settings
· Setting menus have been updated for easier discovery. Daily briefing setting has been added for watch to be smarter. Additionally, Sleeping mode can now be turned on/off. Watch can now be set to wake...

SM-R765N

SM-R770

SM-R750J

SM-R860

SM-R861
The latest build for SM-R765F, R765FXXU2FUD1, was released on May 9, 2021 (5 years ago).
SM-R765F has had no new firmware for 66 months, so regular updates have most likely ended.
Yes, all firmware files for SM-R765F are 100% official, original, and obtained directly from Samsung servers.
To flash SM-R765F, 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-R765F.