Firmware Downloads
Find and download official Stock ROM for Samsung Galaxy Watch Active 2 (44mm) (sm-r820). All firmware files include MD5 hash verification and are available for direct download.
Samsung Galaxy Watch Active 2 (44mm)
| Version | Method | Size | Release Date | MD5 Hash | Download |
|---|---|---|---|---|---|
| R820XXU1DUA7/R820OXA1DUA7/ | Odin | 58.66 MB | 2021-01-01 |
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| R820XXU1CTJ5/R820OXA1CTJ5/ | Odin | 99.1 MB | N/A |
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Download |
| R820XXU1FVH4/R820OXA1FVH4/ | Odin | 16.72 MB | 2022-08-01 |
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| R820XXU1CTI4/R820OXA1CTI4/ | Odin | 117.31 MB | N/A |
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| R820XXU1DUE3/R820OXA1DUE3/ | Odin | 30.42 MB | 2021-05-01 |
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| R820XXU1DUA3/R820OXA1DUA3/ | Odin | 59.23 MB | 2021-01-01 |
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| R820XXU1FWK2/R820OXA1FWK2/ | Odin | 345.06 MB | 2023-11-01 |
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| R820XXU1EVC2/R820OXA1EVC2/ | Odin | 54.61 MB | 2022-03-01 |
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| R820XXU1EUK2/R820OXA1EUK2/ | Odin | 55.01 MB | 2021-11-01 |
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| R820XXU1DUH1/R820OXA1DUH1/ | Odin | 46.05 MB | 2021-08-01 |
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| R820XXU1DUD1/R820OXA1DUD1/ | Odin | 57.38 MB | 2021-04-01 |
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More samsung Devices
Frequently Asked Questions
Q: Is it safe to flash official samsung firmware?
A: Yes — official firmware from the manufacturer is generally safe when you match your device's exact model number and region. Flashing the wrong region or modified firmware can cause issues.
Q: What tool do I need to flash Samsung Galaxy Watch Active 2 (44mm) firmware?
A: Samsung Galaxy Watch Active 2 (44mm) firmware is flashed using Odin. See the step-by-step guide above for the full procedure.
Q: Can I downgrade to an older firmware version?
A: Some devices allow downgrading, others have anti-rollback protection that blocks it. Check the version-specific notes on each ROM page, or your model's community forum, before attempting a downgrade.
Q: What if flashing fails?
A: First, verify the firmware matches your exact model code (e.g. SM-S938B for Samsung, or the CPH-number for OPPO). Reinstall the manufacturer's USB drivers, use a rear USB 2.0 port directly on your PC, and retry. The troubleshooting box above the FAQ covers the most common failure modes.