Samsung Gear S2 Sm-r720 Firmware |top| Download May 2026

| Odin Error Message | Cause | Solution | | :--- | :--- | :--- | | | USB cable fault or driver issue | Use original cradle. Try a USB 2.0 port (not 3.0). Reinstall Samsung USB Driver. | | "Auth (SHA256) failed" | Odin version too old or corrupted firmware | Download Odin3 v3.13.1+ or enable "T Flash" option. Re-download firmware. | | "There is no PIT partition" | Wrong firmware for the model | You downloaded firmware for SM-R732 or a different chipset. Download correct SM-R720 firmware. | | Watch stuck on "Downloading" after error | Flash interrupted | Hold Power button for 15 seconds to force shutdown, then re-enter Download mode and try again. | | "SW REV CHECK FAIL" | You are trying to downgrade | Samsung prevents downgrading to older bootloaders. You must flash a firmware with the same or newer build date. |