Samsung Galaxy S21 official device image

Samsung Galaxy S21

Brand samsung
Codename sm-g991b
Region AFG,AVF,ARO,ANC,CTI,UFN,PSN,XSA,OPS,TEL,VAU,DRE,MO
Official Firmware

Download Samsung Galaxy S21 Firmware

Samsung Galaxy S21 Region: AFG,AVF,ARO,ANC,CTI,UFN,PSN,XSA,OPS,TEL,VAU,DRE,MO

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Firmware Downloads

Find and download official MIUI firmware for Samsung Galaxy S21 (sm-g991b). All firmware files include MD5 hash verification and are available for direct download.

Samsung Galaxy S21

Version Method Size Release Date MD5 Hash Download
G991BXXS9FWL9/G991BOXM9FWK2/G991BXXU9FWK2 Odin 2 B N/A
G991BXXU9EWI7/G991BOWO9EWI7/G991BXXU9EWI6 Odin 232 B N/A
G991BXXU9EWI7/G991BOWE9EWI6/G991BXXU9EWI6 Odin 274 B N/A
G991BXXU9EWH5/G991BOXM9EWH9/G991BXXU9EWH6 Odin 245 B N/A
G991BXXS9FWL5/G991BOXM9FWK5/G991BXXU9FWK5 Odin 2 B N/A
G991BXXU9FWK5/G991BOXM9FWK5/G991BXXU9FWK5 Odin 2 B N/A
G991BXXU9EWH5/G991BOXM9EWH5/G991BXXU9EWH5 Odin 263 B N/A
G991BXXS9FWL4/G991BOXM9FWK3/G991BXXU9FWK2 Odin 2 B N/A
G991BXXU9FWK4/G991BOWO9FWL2/G991BXXU9FWK2 Odin 266 B N/A
G991BXXU9FWL3/G991BOXM9FWL3/G991BXXU9FWL3 Odin 2 B N/A
G991BXXS9EWI3/G991BOWE9EWI3/G991BXXS9EWI3 Odin 1 B N/A
G991BXXS9EWF3/G991BOXM9EWF3/G991BXXS9EWF3 Odin 1 B N/A
G991BXXS9FXA3/G991BOXM9FXA3/G991BXXU9FWK2 Odin 2 B N/A
G991BXXU9FWK3/G991BOXM9FWK3/G991BXXU9FWK2 Odin 2 B N/A
G991BXXS9EWI3/G991BOWO9EWF2/G991BXXS9EWI3 Odin 1 B N/A
G991BXXS9FXA2/G991BOXM9FWK5/G991BXXU9FWK5 Odin 2 B N/A
G991BXXU9FWK2/G991BOXM9FWK2/G991BXXU9FWK2 Odin 2 B N/A
G991BXXS9EWI1/G991BOXM9EWH9/G991BXXU9EWH6 Odin 240 B N/A
G991BXXS9EWI1/G991BOXM9EWH5/G991BXXU9EWH5 Odin 258 B N/A
G991BXXS9EWH1/G991BOXM9EWH1/G991BXXS9EWG9 Odin 1 B N/A
G991BXXS9EWIA/G991BOXM9EWH9/G991BXXU9EWH6 Odin 235 B N/A
G991BXXS9EWJO/G991BOXM9EWH9/G991BXXS9EWJR Odin 2 B N/A
G991BXXS9EWJH/G991BOWO9EWI7/G991BXXS9EWJH Odin 232 B N/A
G991BXXS9EWJQ/G991BOWO9EWI7/G991BXXS9EWJH Odin 2 B N/A
G991BXXS9FXAM/G991BOXM9FWK5/G991BXXU9FWK5 Odin 2 B N/A
G991BXXS9EWJG/G991BOXM9EWH5/G991BXXU9EWH5 Odin 253 B N/A
G991BXXS9EWIA/G991BOXM9EWH5/G991BXXU9EWH5 Odin 253 B N/A
G991BXXS9FXAK/G991BOXM9FWL3/G991BXXU9FWL3 Odin 2 B N/A
G991BXXS9FWLA/G991BOXM9FWL3/G991BXXU9FWL3 Odin 2 B N/A
G991BXXS9FXAH/G991BOXM9FWK2/G991BXXU9FWK2 Odin 2 B N/A
G991BXXS9FXAJ/G991BOWO9FWL2/G991BXXU9FWK2 Odin 2 B N/A
G991BXXS9FWLD/G991BOWO9FWL2/G991BXXU9FWK2 Odin 2 B N/A
G991BXXS9FWKB/G991BOXM9FWK2/G991BXXU9FWK2 Odin 2 B N/A
G991BXXS9FXBH/G991BOWO9FWL2/G991BXXS9FXBD Odin 2 B N/A
G991BXXS9FXAI/G991BOXM9FXAI/G991BXXU9FWK2 Odin 2 B N/A
G991BXXS9FXBD/G991BOXM9FXBD/G991BXXS9FXBD Odin 2 B N/A
G991BXXS9FXBE/G991BOXM9FXBE/G991BXXS9FXBE Odin 2 B N/A
G991BXXS9FXBF/G991BOXM9FXBF/G991BXXS9FXBD Odin 2 B N/A
G991BXXS9FXBG/G991BOXM9FXBG/G991BXXS9FXBG Odin 2 B N/A
G991BXXS9EWJO/G991BOXM9EWJO/G991BXXS9EWJO Odin 2 B N/A
G991BXXS9EWJQ/G991BOWE9EWJP/G991BXXS9EWJH Odin 2 B N/A
G991BXXSCGXH8/G991BOWOCGXH5/G991BXXUCGXGC Odin 398 B N/A
G991BXXU8EWF1/G991BOXM8EWF1/G991BXXU8EWF1 Odin 1 B N/A
G991BXXUBGXE7/G991BOXMBGXE7/G991BXXUBGXE7 Odin 580 B N/A
G991BXXSCGXH7/G991BOXMCGXGC/G991BXXUCGXGC Odin 516 B N/A
G991BXXU7EWE6/G991BOXM7EWE6/G991BXXU7EWE1 Odin 1 B N/A
G991BXXS7EWC4/G991BOWO7EWC4/G991BXXS7EWC4 Odin 1 B N/A
G991BXXS7EWD3/G991BOXM7EWD3/G991BXXS7EWD3 Odin 1 B N/A
G991BXXS7EWE2/G991BOWO7EWCK/G991BXXS7EWE2 Odin 477 B N/A
G991BXXU7EWE1/G991BOXM7EWE1/G991BXXU7EWE1 Odin 1 B N/A
G991BXXU7EWCH/G991BOXM7EWCH/G991BXXU7EWCH Odin 1 B N/A
G991BXXSJHZA6/G991BOXMJHZA6/G991BXXSJHZA6 Odin 303 B N/A
G991BXXSDGXI6/G991BOWEDGXI6/G991BXXSDGXI5 Odin 392 B N/A
G991BXXSDGXI6/G991BOWODGXI6/G991BXXSDGXI5 Odin 393 B N/A
G991BXXS6DWA6/G991BOWO6DVL6/G991BXXS6DWA5 Odin 1 B N/A
G991BXXS6DWB2/G991BOWO6DVL6/G991BXXS6DWA5 Odin 1 B N/A
G991BXXS6EWBB/G991BOXM6EWB5/G991BXXU6EWAF Odin 1 B N/A
G991BXXU6EWAF/G991BOXM6EWB5/G991BXXU6EWAF Odin 1 B N/A
G991BXXS6EWBB/G991BOXM6EWAF/G991BXXU6EWAF Odin 1 B N/A
G991BXXU6EWAF/G991BOXM6EWAF/G991BXXU6EWAF Odin 1 B N/A
G991BXXUEHYD5/G991BOXMEHYD5/G991BXXUEHYD5 Odin 340 B N/A
G991BXXSDGXI5/G991BOXMDGXI5/G991BXXSDGXI5 Odin 508 B N/A
G991BXXSCGXF5/G991BOXMCGXF5/G991BXXSCGXF5 Odin 575 B N/A
G991BXXUCGXH5/G991BOWECGXH5/G991BXXUCGXGC Odin 399 B N/A
G991BXXUCGXH5/G991BOWOCGXH5/G991BXXUCGXGC Odin 385 B N/A
G991BXXU5CVH7/G991BOXM5CVH7/G991BXXU5CVH7 Odin 217 B N/A
G991BXXS5DWA7/G991BOXM5DWA3/G991BXXU5DVL2 Odin 1 B N/A
G991BXXU5CVI6/G991BOWE5CVI6/G991BXXU5CVI6 Odin 1 B N/A
G991BXXU5CVI6/G991BOWO5CVI6/G991BXXU5CVI6 Odin 1 B N/A
G991BXXS5DWA4/G991BOXM5DVKF/G991BXXU5DVL2 Odin 1 B N/A
G991BXXU5DWA3/G991BOXM5DWA3/G991BXXU5DVL2 Odin 2 B N/A
G991BXXU5DVK3/G991BOXM5DVK3/G991BXXU5DVJA Odin 1 B N/A
G991BXXS5DVL3/G991BOXM5DVKF/G991BXXU5DVL2 Odin 1 B N/A
G991BXXU5DVL2/G991BOWO5DVL5/G991BXXU5DVL1 Odin 1 B N/A
G991BXXU5CVF1/G991BOXM5CVF1/G991BXXU5CVF3 Odin 667 B N/A
G991BXXS5DVK1/G991BOXM5DVJC/G991BXXU5DVJA Odin 2 B N/A
G991BXXS5CVIF/G991BOXM5CVH7/G991BXXU5CVH7 Odin 2 B N/A
G991BXXS5CVHI/G991BOXM5CVH7/G991BXXU5CVH7 Odin 217 B N/A
G991BXXU5CVGC/G991BOWO5CVG7/G991BXXU5CVG3 Odin 763 B N/A
G991BXXS5DVKE/G991BOXM5DVK3/G991BXXU5DVJA Odin 2 B N/A
G991BXXU5CVGB/G991BOXM5CVGB/G991BXXU5CVG3 Odin 595 B N/A
G991BXXS5CVFB/G991BOXM5CVFB/G991BXXU5CVF3 Odin 660 B N/A
G991BXXU5DVKF/G991BOXM5DVKF/G991BXXU5DVL2 Odin 1 B N/A
G991BXXU5DVJC/G991BOXM5DVJC/G991BXXU5DVJA Odin 2 B N/A
G991BXXS5CVEA/G991BOWO5CVDD/G991BXXU5CVDD Odin 1 B N/A
G991BXXU5CVDD/G991BOXM5CVDD/G991BXXU5CVDD Odin 1 B N/A
G991BXXSCGXF4/G991BOXMCGXF6/G991BXXSCGXF4 Odin 579 B N/A
G991BXXSBGXE4/G991BOWEBGXE4/G991BXXSBGXDH Odin 563 B N/A
G991BXXS4BVA8/G991BOXM4BULF/G991BXXU4BULG Odin 2 B N/A
G991BXXU4CVC4/G991BOXM4CVC4/G991BXXU4CVC2 Odin 1 B N/A
G991BXXU4CVD2/G991BOXM4CVD2/G991BXXU4CVC2 Odin 1 B N/A
G991BXXU4BVB1/G991BOXM4BVB1/G991BXXU4BVB1 Odin 2 B N/A
G991BXXS4CVCG/G991BOWO4CVB9/G991BXXU4CVC2 Odin 1 B N/A
G991BXXS4BVAA/G991BOWO4BULG/G991BXXU4BULG Odin 1 B N/A
G991BXXU4BULF/G991BOXM4BULF/G991BXXU4BULG Odin 2 B N/A
G991BXXU3BUK8/G991BOXM3BUK8/G991BXXU3BUK8 Odin 2 B N/A
G991BXXS3AUJ7/G991BOXM3AUIE/G991BXXU3AUIF Odin 2 B N/A
G991BXXU3AUF6/G991BOXM3AUF6/G991BXXU3AUF9 Odin 998 B N/A
G991BXXS3BUL6/G991BOXM3BUKG/G991BXXU3BUKG Odin 2 B N/A
G991BXXU3AUG4/G991BOXM3AUG4/G991BXXU3AUG4 Odin 960 B N/A
G991BXXU3AUE1/G991BOXM3AUE1/G991BXXU3AUE1 Odin 1 B N/A
G991BXXS3BUL1/G991BOXM3BUKG/G991BXXU3BUKG Odin 2 B N/A
G991BXXS3AUFD/G991BOXM3AUF6/G991BXXU3AUF9 Odin 997 B N/A
G991BXXS3BULC/G991BOXM3BUKG/G991BXXU3BUKG Odin 2 B N/A
G991BXXU3BUKA/G991BOXM3BUKA/G991BXXU3BUKB Odin 2 B N/A
G991BXXU3BUKG/G991BOXM3BUKG/G991BXXU3BUKG Odin 2 B N/A
G991BXXU3AUIE/G991BOXM3AUIE/G991BXXU3AUIF Odin 210 B N/A
G991BXXS3AUHD/G991BOXM3AUHB/G991BXXU3AUHB Odin 307 B N/A
G991BXXU3AUHB/G991BOXM3AUHB/G991BXXU3AUHB Odin 307 B N/A
G991BXXU3AUGM/G991BOXM3AUGM/G991BXXU3AUGM Odin 934 B N/A
G991BXXSJHZC2/G991BOXMJHZC2/G991BXXSJHZA6 Odin 1 B N/A
G991BXXSEGYA2/G991BOXMEGXL2/G991BXXSEGXL2 Odin 3 B N/A
G991BXXSEGXL2/G991BOXMEGXL2/G991BXXSEGXL2 Odin 248 B N/A
G991BXXU2AUC8/G991BOXM2AUC8/G991BXXU2AUC8 Odin 1 B N/A
G991BXXS2AUBB/G991BOXM2AUBB/G991BXXU2AUBB Odin 1 B N/A
G991BXXSIHYK1/G991BOXMIHYK1/G991BXXSIHYK1 Odin 281 B N/A
G991BXXSHHYJ1/G991BOXMHHYJ1/G991BXXSHHYJ1 Odin 292 B N/A
G991BXXSGHYH1/G991BOXMGHYH1/G991BXXSGHYH1 Odin 307 B N/A
G991BXXSFHYE1/G991BOXMFHYE1/G991BXXSFHYE1 Odin 323 B N/A
G991BXXSEGXK1/G991BOXMEGXJE/G991BXXUEGXJE Odin 282 B N/A
G991BXXU1AUB8/G991BOXM1AUB8/G991BXXU1AUB8 Odin 1 B N/A
G991BXXU1AUB6/G991BOXM1AUB6/G991BXXU1AUB7 Odin 1 B N/A
G991BXXU1AUA4/G991BOXM1AUA4/G991BXXU1AUA4 Odin 1 B N/A
G991BXXU1AUB3/G991BOXM1AUB3/G991BXXU1AUB3 Odin 2 B N/A
G991BXXU1AUAB/G991BOXM1AUAB/G991BXXU1AUAB Odin 2 B N/A
G991BXXU1ATLD/G991BOXM1ATLD/G991BXXU1ATLD Odin 2 B N/A
G991BXXSAFXCQ/G991BOWOAFWL2/G991BXXSAFXCL Odin 2 B N/A
G991BXXUEGXJE/G991BOXMEGXJE/G991BXXUEGXJE Odin 290 B N/A
G991BXXUCGXGC/G991BOXMCGXGC/G991BXXUCGXGC Odin 516 B N/A
G991BXXSBGXEC/G991BOXMBGXEE/G991BXXSBGXEC Odin 579 B N/A
G991BXXSBGXED/G991BOXMBGXED/G991BXXSBGXED Odin 578 B N/A
G991BXXSBGXDH/G991BOXMBGXDG/G991BXXSBGXDH Odin 585 B N/A
G991BXXSBGXDH/G991BOXMBGXDH/G991BXXSBGXDH Odin 585 B N/A
G991BXXUAGXDA/G991BOXMAGXDA/G991BXXUAGXDA Odin 582 B N/A
G991BXXUAGXDA/G991BOXMAGXDC/G991BXXUAGXDA Odin 582 B N/A
G991BXXSAFXCL/G991BOXMAFXCL/G991BXXSAFXCL Odin 2 B N/A
G991BXXSAFXCM/G991BOXMAFXCM/G991BXXSAFXCM Odin 2 B N/A
G991BXXSAFXCO/G991BOXMAFXCO/G991BXXSAFXCO Odin 2 B N/A
G991BXXSAFXCP/G991BOXMAFXCP/G991BXXSAFXCL Odin 2 B N/A

Device Specifications

Versions: SM-G991B, SM-G991B/DS (International); SM-G991U (USA); SM-G991U1 (USA unlocked); SM-G991W (Canada); SM-G991N (Korea); SM-G9910 (China)

NetworkTechnologyGSM / CDMA / HSPA / EVDO / LTE / 5G
2G bandsGSM 850 / 900 / 1800 / 1900
 CDMA 800 / 1900 & TD-SCDMA
3G bandsHSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
 CDMA2000 1xEV-DO
4G bands1, 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 bands2, 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
SpeedHSPA 42.2/5.76 Mbps, LTE (7CA) Cat20 2000/200 Mbps, 5G (5+ Gbps DL)
LaunchAnnounced2021, January 14
StatusAvailable. Released 2021, January 29
BodyDimensions151.7 x 71.2 x 7.9 mm (5.97 x 2.80 x 0.31 in)
Weight169 g (Sub6), 171 g (mmWave) (5.96 oz)
BuildGlass 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)
DisplayTypeDynamic AMOLED 2X, 120Hz, HDR10+, 1300 nits (peak)
Size6.2 inches, 94.1 cm2 (~87.2% screen-to-body ratio)
Resolution1080 x 2400 pixels, 20:9 ratio (~421 ppi density)
ProtectionCorning Gorilla Glass Victus
PlatformOSAndroid 11, up to 4 major Android upgrades, One UI 7
ChipsetExynos 2100 (5 nm) - International
Qualcomm SM8350 Snapdragon 888 5G (5 nm) - USA/China
CPUOcta-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
GPUMali-G78 MP14 - International
Adreno 660 - USA/China
MemoryCard slotNo
Internal128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM
 UFS 3.1
Main CameraTriple12 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
FeaturesLED flash, auto-HDR, panorama
Video8K@24fps, 4K@30/60fps, 1080p@30/60/120/240fps, HDR10+, stereo sound rec., gyro-EIS
Selfie cameraSingle10 MP, f/2.2, 26mm (wide), 1/3.24", 1.22µm, dual pixel PDAF
FeaturesHDR
Video4K@30/60fps, 1080p@30fps
SoundLoudspeaker Yes, with stereo speakers
3.5mm jack No
 High-bitrate audio support
CommsWLANWi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi Direct
Bluetooth5.0, A2DP, LE
PositioningGPS, GLONASS, BDS, GALILEO
NFCYes
RadioFM radio (Snapdragon model only; market/operator dependent)
USBUSB Type-C 3.2, OTG
FeaturesSensorsFingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compass, barometer
 Samsung DeX, Samsung Wireless DeX (desktop experience support)
BatteryTypeLi-Ion 4000 mAh
Charging25W wired, PD3.0
15W wireless (Qi)
4.5W reverse wireless
MiscColorsPhantom Gray, Phantom White, Phantom Violet, Phantom Pink
ModelsSM-G991B, SM-G991B/DS, SM-G991U, SM-G991U1, SM-G991W, SM-G991N, SM-G9910, SM-G991Q, SCG09
SAR0.74 W/kg (head)     1.08 W/kg (body)    
SAR EU0.46 W/kg (head)     1.51 W/kg (body)    
Price$ 164.44 / € 156.88 / £ 130.00
Our TestsPerformance 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
Data source: GSMArena

More samsung Devices

How to Flash Firmware

Steps to Install Firmware:

  1. Download the ROM: Choose the appropriate firmware version above for your device region
  2. Backup Your Data: All data will be erased during flashing
  3. Unlock Bootloader: Required for some devices (check device-specific requirements)
  4. Download Tools: Download MIUI Flash Tool or use ADB/Fastboot
  5. Flash the ROM: Follow the tool's instructions to flash the downloaded firmware
  6. Verify: Restart and verify successful installation

⚠️ Warning: Flashing custom ROMs may void your warranty. Proceed at your own risk.

Frequently Asked Questions

Q: Is it safe to flash official firmware?

A: Yes, flashing official firmware is generally safe and won't void your warranty if done through official methods.

Q: What's the difference between Recovery and Fastboot ROMs?

A: Recovery ROMs are flashed from recovery mode, while Fastboot ROMs require bootloader unlock and ADB tools.

Q: Can I downgrade to an older firmware version?

A: Some devices allow downgrading, but it depends on the device and region. Check device-specific forums first.

Q: What if flashing fails?

A: If flashing fails, try using the official tool, ensure USB drivers are installed, and check device compatibility.