Samsung Galaxy S21 (SM-G9910) is a samsung device (codename: sm-g9910). FirmwareMirror hosts 112 verified firmware builds, covering: CHC, BRI, TGY. Available as official firmware. Last updated: February 2026. All files MD5-verified. Free, no registration.
Find and download official Stock ROM for Samsung Galaxy S21 (SM-G9910) (sm-g9910). All firmware files include MD5 hash verification and are available for direct download.
| Version | Method | Size | Release Date | MD5 Hash | Download |
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| G9910ZHUBHYD9/G9910OZSBHYD9/G9910ZCUBHYD9 | Odin | 375.73 MB | 2025-04-01 |
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| G9910ZCS9GXF3/G9910CHC9GXF3/G9910ZCS9GXF3 | Odin | 529.2 MB | 2024-06-01 |
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| G9910ZHS9GXF3/G9910OZS9GXF3/G9910ZCS9GXF3 | Odin | 396.04 MB | 2024-06-01 |
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| G9910ZCS9GXH2/G9910CHC9GXH2/G9910ZCS9GXH2 | Odin | 520.8 MB | 2024-08-01 |
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| G9910ZHS9GXH2/G9910OZS9GXH2/G9910ZCS9GXH2 | Odin | 386.76 MB | 2024-08-01 |
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| G9910ZCS9GXH1/G9910CHC9GXH1/G9910ZCS9GXH1 | Odin | 527.04 MB | 2024-08-01 |
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| G9910ZHS9GXH1/G9910OZS9GXH1/G9910ZCS9GXH1 | Odin | 394.94 MB | 2024-08-01 |
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| G9910ZCS8GXE2/G9910CHC8GXE2/G9910ZCS8GXE2 | Odin | 535.88 MB | 2024-05-01 |
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| G9910ZHS8GXE2/G9910OZS8GXE2/G9910ZCS8GXE2 | Odin | 401.7 MB | 2024-05-01 |
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| G9910ZHS8GXF1/G9910OZS8GXF1/G9910ZCS8GXF1 | Odin | 397.6 MB | 2024-06-01 |
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| G9910ZCU7GXDE/G9910CHC7GXDE/G9910ZCU7GXDE | Odin | 537.9 MB | 2024-04-01 |
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| G9910ZHU7GXDE/G9910OZS7GXDE/G9910ZCU7GXDE | Odin | 403.69 MB | 2024-04-01 |
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| G9910ZHS7FXBC/G9910OZS7FXBC/G9910ZCS7FXBC | Odin | 2.06 GB | 2024-02-01 |
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| G9910ZHS7FXAE/G9910OZS7FXAE/G9910ZCS7FXAE | Odin | 2.06 GB | 2024-01-01 |
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| G9910ZHU6FWK7/G9910OZS6FWK7/G9910ZCU6FWK7 | Odin | 2.04 GB | 2023-11-01 |
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| G9910ZHS6FWL3/G9910OZS6FWL3/G9910ZCS6FWL3 | Odin | 2.04 GB | 2023-12-01 |
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| G9910ZCU6FWL2/G9910CHC6FWL2/G9910ZCU6FWL2 | Odin | 1.95 GB | 2023-12-01 |
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| G9910ZCS6FXA1/G9910CHC6FXA1/G9910ZCU6FWL2 | Odin | 1.94 GB | 2024-01-01 |
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| G9910ZHS6FXA1/G9910OZS6FXA1/G9910ZCS6FXA1 | Odin | 2.04 GB | 2024-01-01 |
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| G9910ZCS6EWJ1/G9910CHC6EWJ1/G9910ZCS6EWJ1 | Odin | 2.22 GB | 2023-10-01 |
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| G9910ZHS6EWJ1/G9910OZS6EWJ1/G9910ZCS6EWJ1 | Odin | 2.42 GB | 2023-10-01 |
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| G9910ZCSBGYA5/G9910CHCBGYA5/G9910ZCSBGYA5 | Odin | 2.93 GB | 2025-01-01 |
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| G9910ZHSBGYA5/G9910OZSBGYA5/G9910ZCSBGYA5 | Odin | 3.16 GB | 2025-01-01 |
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| G9910ZCU5EWH6/G9910CHC5EWH6/G9910ZCU5EWH6 | Odin | 422.27 MB | 2023-08-01 |
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| G9910ZHU5EWH6/G9910OZS5EWH6/G9910ZCU5EWH6 | Odin | 295.91 MB | 2023-08-01 |
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| G9910ZHS5EWG1/G9910OZS5EWG1/G9910ZCS5EWG2 | Odin | 1.22 GB | 2023-07-01 |
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| G9910ZHS5EWI1/G9910OZS5EWI1/G9910ZCS5EWI1 | Odin | 289.84 MB | 2023-09-01 |
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| G9910ZCS5EWG1/G9910CHC5EWG1/G9910ZCS5EWG1 | Odin | 1.08 GB | 2023-07-01 |
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| G9910ZCSBGXJ4/G9910CHCBGXJ4/G9910ZCSBGXJ4 | Odin | 499.25 MB | 2024-10-01 |
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| G9910ZHSBGXJ4/G9910OZSBGXJ4/G9910ZCSBGXJ4 | Odin | 359.7 MB | 2024-10-01 |
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| G9910ZCSBGXK4/G9910CHCBGXK4/G9910ZCSBGXK3 | Odin | 395.36 MB | 2024-11-01 |
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| G9910ZHU4EWE5/G9910OZS4EWE5/G9910ZCU4EWE5 | Odin | 1.23 GB | 2023-05-01 |
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| G9910ZCU4EWE5/G9910CHC4EWE5/G9910ZCU4EWF1 | Odin | 1.09 GB | 2023-05-01 |
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| G9910ZHSBGXK3/G9910OZSBGXK3/G9910ZCSBGXK3 | Odin | 324.22 MB | 2024-11-01 |
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| G9910ZCU3EWD3/G9910CHC3EWD3/G9910ZCU3EWD3 | Odin | 1.1 GB | 2023-04-01 |
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| G9910ZHU3EWD3/G9910OZS3EWD3/G9910ZCU3EWD3 | Odin | 1.24 GB | 2023-04-01 |
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| G9910ZHS3EWE1/G9910OZS3EWE1/G9910ZCS3EWE1 | Odin | 1.24 GB | 2023-05-01 |
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| G9910ZCSDHYF2/G9910CHCDHYF2/G9910ZCSDHYF2 | Odin | 463.57 MB | 2025-06-01 |
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| G9910ZHSDHYF2/G9910OZSDHYF2/G9910ZCSDHYF2 | Odin | 355.82 MB | 2025-06-01 |
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| G9910ZCSAGXJ2/G9910CHCAGXJ2/G9910ZCSAGXJ2 | Odin | 508.3 MB | 2024-10-01 |
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| G9910ZHSAGXJ2/G9910OZSAGXJ2/G9910ZCSAGXJ2 | Odin | 372.69 MB | 2024-10-01 |
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| G9910ZCU2DVK9/G9910CHC2DVK9/G9910ZCU2DVK9 | Odin | 1.81 GB | 2022-11-01 |
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| G9910ZHU2DVK9/G9910OZS2DVK9/G9910ZCU2DVK9 | Odin | 1.93 GB | 2022-11-01 |
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| G9910ZHU2CVH9/G9910OZS2CVH9/G9910ZCU2CVH9 | Odin | 274.84 MB | 2022-08-01 |
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| G9910ZCU2AUC9/G9910CHC2AUC9/G9910ZCU2AUC9 | Odin | 1.25 GB | 2021-03-01 |
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| G9910ZHU2AUC9/G9910OZS2AUC9/G9910ZCU2AUC9 | Odin | 1.62 GB | 2021-03-01 |
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| G9910ZCU2DWA8/G9910CHC2DWA8/G9910ZCU2DWA8 | Odin | 1.79 GB | 2023-01-01 |
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| G9910ZHU2DWA8/G9910OZS2DWA8/G9910ZCU2DWA8 | Odin | 1.89 GB | 2023-01-01 |
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| G9910ZHS2CVH8/G9910OZS2CVH8/G9910ZCU2CVG2 | Odin | 619.75 MB | 2022-08-01 |
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| G9910ZHU2CVD6/G9910OZS2CVD6/G9910ZCU2CVD6 | Odin | 1.18 GB | 2022-04-01 |
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| G9910ZCU2AUI6/G9910CHC2AUI6/G9910ZCU2AUI6 | Odin | 256.58 MB | 2021-09-01 |
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| G9910ZHU2AUI6/G9910OZS2AUI6/G9910ZCU2AUI6 | Odin | 270.96 MB | 2021-09-01 |
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| G9910ZHU2AUF6/G9910OZS2AUF6/G9910ZCU2AUF6 | Odin | 1.05 GB | 2021-06-01 |
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| G9910ZCU2AUF5/G9910CHC2AUF5/G9910ZCU2AUF5 | Odin | 996.24 MB | 2021-06-01 |
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| G9910ZCS2CVI4/G9910CHC2CVI4/G9910ZCS2CVI4 | Odin | 2.15 GB | 2022-09-01 |
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| G9910ZCU2CVC4/G9910CHC2CVC4/G9910ZCU2CVC4 | Odin | 1.03 GB | 2022-03-01 |
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| G9910ZHU2CVC4/G9910OZS2CVC4/G9910ZCU2CVC4 | Odin | 1.18 GB | 2022-03-01 |
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| G9910ZHS2DVL3/G9910OZS2DVL3/G9910ZCS2DVL3 | Odin | 1.93 GB | 2022-12-01 |
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| G9910ZCU2BUL3/G9910CHC2BUL3/G9910ZCU2BUL3 | Odin | 1.76 GB | 2021-12-01 |
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| G9910ZHU2BUL3/G9910OZS2BUL3/G9910ZCU2BUL3 | Odin | 1.93 GB | 2021-12-01 |
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| G9910ZCU2EWB2/G9910CHC2EWB2/G9910ZCU2EWB2 | Odin | 1.41 GB | 2023-02-01 |
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| G9910ZHS2CVI2/G9910OZS2CVI2/G9910ZCS2CVI2 | Odin | 273.95 MB | 2022-09-01 |
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| G9910ZCU2CVG2/G9910CHC2CVG2/G9910ZCU2CVG2 | Odin | 662.44 MB | 2022-07-01 |
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| G9910ZHU2CVG2/G9910OZS2CVG2/G9910ZCU2CVG2 | Odin | 620.08 MB | 2022-07-01 |
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| G9910ZCU2BVA2/G9910CHC2BVA2/G9910ZCU2BVA2 | Odin | 1.7 GB | 2022-01-01 |
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| G9910ZHU2BVA2/G9910OZS2BVA2/G9910ZCU2BVA2 | Odin | 1.94 GB | 2022-01-01 |
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| G9910ZHS2AUG2/G9910OZS2AUG2/G9910ZCS2AUG2 | Odin | 1.05 GB | 2021-07-01 |
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| G9910ZHS2EWC1/G9910OZS2EWC1/G9910ZCS2EWC1 | Odin | 1.53 GB | 2023-03-01 |
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| G9910ZHU2EWB1/G9910OZS2EWB1/G9910ZCU2EWB1 | Odin | 1.53 GB | 2023-02-01 |
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| G9910ZHS2CVJ1/G9910OZS2CVJ1/G9910ZCS2CVJ1 | Odin | 2.16 GB | 2022-10-01 |
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| G9910ZCU2CVI1/G9910CHC2CVI1/G9910ZCU2CVI1 | Odin | 255.69 MB | 2022-09-01 |
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| G9910ZCU2CVF1/G9910CHC2CVF1/G9910ZCU2CVF1 | Odin | 682.58 MB | 2022-06-01 |
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| G9910ZHU2CVF1/G9910OZS2CVF1/G9910ZCU2CVF1 | Odin | 634.7 MB | 2022-06-01 |
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| G9910ZHS2BVB1/G9910OZS2BVB1/G9910ZCS2BVB1 | Odin | 1.94 GB | 2022-02-01 |
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| G9910ZCU2AUH1/G9910CHC2AUH1/G9910ZCU2AUH1 | Odin | 272.31 MB | 2021-08-01 |
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| G9910ZCS2AUG1/G9910CHC2AUG1/G9910ZCS2AUG1 | Odin | 995.82 MB | 2021-07-01 |
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| G9910ZHU2AUDD/G9910OZS2AUDD/G9910ZCU2AUE1 | Odin | 1.09 GB | 2021-04-01 |
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| G9910ZCU2CVDD/G9910CHC2CVDD/G9910ZCU2CVDD | Odin | 879.11 MB | 2022-04-01 |
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| G9910ZHU2CVDD/G9910OZS2CVDD/G9910ZCU2CVDD | Odin | 1019.85 MB | 2022-04-01 |
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| G9910ZCS2CVCB/G9910CHC2CVCB/G9910ZCS2CVCB | Odin | 1.03 GB | 2022-03-01 |
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| G9910ZHS2CVCB/G9910OZS2CVCB/G9910ZCS2CVCB | Odin | 1.18 GB | 2022-03-01 |
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| G9910ZCS2AUIN/G9910CHC2AUIN/G9910ZCS2AUIN | Odin | 2.41 GB | 2021-09-01 |
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| G9910ZHS2AUIN/G9910OZS2AUIN/G9910ZCS2AUIN | Odin | 2.5 GB | 2021-09-01 |
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| G9910ZCU2AUGE/G9910CHC2AUGE/G9910ZCU2AUGE | Odin | 960.18 MB | 2021-07-01 |
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| G9910ZHU2AUGE/G9910OZS2AUGE/G9910ZCU2AUGE | Odin | 1.01 GB | 2021-07-01 |
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| G9910ZHU2AUGR/G9910OZS2AUGR/G9910ZCU2AUGR | Odin | 283.88 MB | 2021-07-01 |
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| G9910ZCU2AUDA/G9910CHC2AUDA/G9910ZCU2AUDA | Odin | 1.02 GB | 2021-04-01 |
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| G9910ZCU2AUDD/G9910CHC2AUDD/G9910ZCU2AUDD | Odin | 1.02 GB | 2021-04-01 |
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| G9910ZHU2AUDA/G9910OZS2AUDA/G9910ZCU2AUDA | Odin | 1.09 GB | 2021-04-01 |
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| G9910ZCU2AUBB/G9910CHC2AUBB/G9910ZCU2AUBC | Odin | 1.55 GB | 2021-02-01 |
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| G9910ZHU2AUBB/G9910OZS2AUBB/G9910ZCU2AUBC | Odin | 1.74 GB | 2021-02-01 |
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| G9910ZCSGHZB1/G9910CHCGHZB1/G9910ZCSGHZB1 | Odin | 1.22 GB | 2026-02-01 |
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| G9910ZHSGHZB1/G9910OZSGHZB1/G9910ZCSGHZB1 | Odin | 1.24 GB | 2026-02-01 |
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| G9910ZCSFHYL1/G9910CHCFHYL1/G9910ZCSFHYL1 | Odin | 1.03 GB | 2025-12-01 |
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| G9910ZHSFHYL1/G9910OZSFHYL1/G9910ZCSFHYL1 | Odin | 790.19 MB | 2025-12-01 |
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| G9910ZCSEHYI1/G9910CHCEHYI1/G9910ZCSEHYI1 | Odin | 420.91 MB | 2025-09-01 |
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| G9910ZHSEHYI1/G9910OZSEHYI1/G9910ZCSEHYI1 | Odin | 331.36 MB | 2025-09-01 |
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| G9910ZCSCHYE1/G9910CHCCHYE1/G9910ZCSCHYE1 | Odin | 478.54 MB | 2025-05-01 |
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| G9910ZHSCHYE1/G9910OZSCHYE1/G9910ZCSCHYE1 | Odin | 359.22 MB | 2025-05-01 |
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| G9910ZCU1AUB7/G9910CHC1AUB7/G9910ZCU1AUB9 | Odin | 1.55 GB | 2021-02-01 |
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| G9910ZHU1AUB7/G9910OZS1AUB7/G9910ZCU1AUB7 | Odin | 1.74 GB | 2021-02-01 |
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| G9910ZHU1AUA7/G9910OZS1AUA7/G9910ZCU1AUA7 | Odin | 1.81 GB | 2021-01-01 |
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| G9910ZCU1AUA4/G9910CHC1AUA4/G9910ZCU1AUA4 | Odin | 1.58 GB | 2021-01-01 |
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| G9910ZHU1AUA4/G9910OZS1AUA4/G9910ZCU1AUA4 | Odin | 1.8 GB | 2021-01-01 |
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| G9910ZCU1AUAE/G9910CHC1AUAE/G9910ZCU1AUAE | Odin | 1.55 GB | 2021-01-01 |
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| G9910ZCU1AUAG/G9910CHC1AUAG/G9910ZCU1AUAH | Odin | 1.55 GB | 2021-01-01 |
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| G9910ZHU1AUAE/G9910OZS1AUAE/G9910ZCU1AUAE | Odin | 1.74 GB | 2021-01-01 |
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| G9910ZHU1AUAG/G9910OZS1AUAG/G9910ZCU1AUAG | Odin | 1.84 GB | 2021-01-01 |
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| G9910ZCU1ATLH/G9910CHC1ATLH/G9910ZCU1ATLH | Odin | 1.65 GB | N/A |
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| G9910ZHU1ATLG/G9910OZS1ATLG/G9910ZCU1ATLG | Odin | 1.83 GB | N/A |
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| G9910ZCUBHYDA/G9910CHCBHYDA/G9910ZCUBHYD9 | Odin | 480.13 MB | 2025-04-01 |
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| G9910ZHSBGXLB/G9910OZSBGXLB/G9910ZCSBGXLB | Odin | 308.29 MB | 2024-12-01 |
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Versions: SM-G991B, SM-G991B/DS (International); SM-G991U (USA); SM-G991U1 (USA unlocked); SM-G991W (Canada); SM-G991N (Korea); SM-G9910 (China)
| Network | Technology | GSM / CDMA / HSPA / EVDO / LTE / 5G |
|---|---|---|
| 2G bands | GSM 850 / 900 / 1800 / 1900 | |
| CDMA 800 / 1900 & TD-SCDMA | ||
| 3G bands | HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 | |
| CDMA2000 1xEV-DO | ||
| 4G bands | 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 30, 38, 39, 40, 41, 46, 48, 66, 71 - SM-G991U1 | |
| 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 32, 38, 39, 40, 41, 66 - SM-G991B | ||
| 5G bands | 2, 5, 25, 41, 66, 71, 260, 261 SA/NSA/Sub6/mmWave - SM-G991U1 | |
| 1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 66, 77, 78 SA/NSA/Sub6 - SM-G991B | ||
| Speed | HSPA 42.2/5.76 Mbps, LTE (7CA) Cat20 2000/200 Mbps, 5G (5+ Gbps DL) |
| Launch | Announced | 2021, January 14 |
|---|---|---|
| Status | Available. Released 2021, January 29 |
| Body | Dimensions | 151.7 x 71.2 x 7.9 mm (5.97 x 2.80 x 0.31 in) |
|---|---|---|
| Weight | 169 g (Sub6), 171 g (mmWave) (5.96 oz) | |
| Build | Glass front (Gorilla Glass Victus), plastic back, aluminum frame | |
| SIM | · Nano-SIM + eSIM · Nano-SIM + Nano-SIM + eSIM (max 2 at a time) | |
| IP68 dust tight and water resistant (immersible up to 1.5m for 30 min) |
| Display | Type | Dynamic AMOLED 2X, 120Hz, HDR10+, 1300 nits (peak) |
|---|---|---|
| Size | 6.2 inches, 94.1 cm2 (~87.2% screen-to-body ratio) | |
| Resolution | 1080 x 2400 pixels, 20:9 ratio (~421 ppi density) | |
| Protection | Corning Gorilla Glass Victus |
| Platform | OS | Android 11, up to 4 major Android upgrades, One UI 7 |
|---|---|---|
| Chipset | Exynos 2100 (5 nm) - International Qualcomm SM8350 Snapdragon 888 5G (5 nm) - USA/China | |
| CPU | Octa-core (1x2.9 GHz Cortex-X1 & 3x2.80 GHz Cortex-A78 & 4x2.2 GHz Cortex-A55) - International Octa-core (1x2.84 GHz Cortex-X1 & 3x2.42 GHz Cortex-A78 & 4x1.80 GHz Cortex-A55) - USA/China | |
| GPU | Mali-G78 MP14 - International Adreno 660 - USA/China |
| Memory | Card slot | No |
|---|---|---|
| Internal | 128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM | |
| UFS 3.1 |
| Main Camera | Triple | 12 MP, f/1.8, 26mm (wide), 1/1.76", 1.8µm, dual pixel PDAF, OIS 64 MP, f/2.0, 29mm (telephoto), 1/1.72", 0.8µm, PDAF, OIS, 1.1x optical zoom, 3x hybrid zoom 12 MP, f/2.2, 13mm, 120˚ (ultrawide), 1/2.55" 1.4µm, Super Steady video |
|---|---|---|
| Features | LED flash, auto-HDR, panorama | |
| Video | 8K@24fps, 4K@30/60fps, 1080p@30/60/120/240fps, HDR10+, stereo sound rec., gyro-EIS |
| Selfie camera | Single | 10 MP, f/2.2, 26mm (wide), 1/3.24", 1.22µm, dual pixel PDAF |
|---|---|---|
| Features | HDR | |
| Video | 4K@30/60fps, 1080p@30fps |
| Sound | Loudspeaker | Yes, with stereo speakers |
|---|---|---|
| 3.5mm jack | No | |
| High-bitrate audio support |
| Comms | WLAN | Wi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi Direct |
|---|---|---|
| Bluetooth | 5.0, A2DP, LE | |
| Positioning | GPS, GLONASS, BDS, GALILEO | |
| NFC | Yes | |
| Radio | FM radio (Snapdragon model only; market/operator dependent) | |
| USB | USB Type-C 3.2, OTG |
| Features | Sensors | Fingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compass, barometer |
|---|---|---|
| Samsung DeX, Samsung Wireless DeX (desktop experience support) |
| Battery | Type | Li-Ion 4000 mAh |
|---|---|---|
| Charging | 25W wired, PD3.0 15W wireless (Qi) 4.5W reverse wireless |
| Misc | Colors | Phantom Gray, Phantom White, Phantom Violet, Phantom Pink |
|---|---|---|
| Models | SM-G991B, SM-G991B/DS, SM-G991U, SM-G991U1, SM-G991W, SM-G991N, SM-G9910, SM-G991Q, SCG09 | |
| SAR | 0.74 W/kg (head) 1.08 W/kg (body) | |
| SAR EU | 0.46 W/kg (head) 1.51 W/kg (body) | |
| Price | $ 164.44 / € 156.88 / £ 130.00 |
| Our Tests | Performance | AnTuTu: 584055 (v8) GeekBench: 3238 (v5.1) GFXBench: 60fps (ES 3.1 onscreen) |
|---|---|---|
| Display | 856 nits max brightness (measured) | |
| Camera | Photo / Video | |
| Loudspeaker | -26.4 LUFS (Good) | |
| Battery (old) | Endurance rating 93h | |
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.
A: Samsung Galaxy S21 (SM-G9910) firmware is flashed using Odin. See the step-by-step guide above for the full procedure.
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.
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.
