If the update fails or your watch is stuck in a bootloop, you may need to use the Odin Tool to flash the stock firmware manually. This is a technical process that involves putting the watch into "Download Mode" by holding both side buttons during a reboot. Troubleshooting Common Firmware Issues
Samsung releases firmware under the platform (e.g., Tizen 4.x.x.x). The firmware package typically includes: Sm-r880 Firmware
Click . Wait 5–10 minutes. Watch will reboot automatically. If the update fails or your watch is
sdb devices sdb shell cat /etc/version
If the watch shows only a black screen or “An error has occurred”: Sm-r880 Firmware