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Samsung Galaxy S21 SM-G991U1 specifications Expand
Released 2021, January 29
169g (Sub6), 171g (mmWave), 7.9mm thickness
Android 11, One UI 3.1
128GB/256GB storage, no card slot

Samsung Galaxy S21 was announced at 2021, January 14 with Android 11, One UI 3.1, have 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 Kryo 680 & 3x2.42 GHz Kryo 680 & 4x1.80 GHz Kryo 680) - USA/China and GPU Mali-G78 MP14 - International,Adreno 660 - USA/China. It have 128GB 8GB RAM, 256GB 8GB RAM storage and there are colors: Phantom Gray, Phantom White, Phantom Violet, Phantom Pink

NETWORK
Technology
GSM / CDMA / HSPA / EVDO / LTE / 5G
2G
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (Dual SIM model only)
3G
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
4G
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
5G
2, 5, 25, 41, 66, 71, 260, 261 SA/NSA/Sub6/mmWave - SM-G991U1
Speed
HSPA 42.2/5.76 Mbps, LTE-A (CA), 5G
TIMELINE
Announced
2021, January 14
Released
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
Single SIM (Nano-SIM and/or eSIM) or Dual SIM (Nano-SIM and/or eSIM, dual stand-by)
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
Always-on display
PLATFORM
OS
Android 11, One UI 3.1
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 Kryo 680 & 3x2.42 GHz Kryo 680 & 4x1.80 GHz Kryo 680) - USA/China
GPU
Mali-G78 MP14 - International
Adreno 660 - USA/China
MEMORY
Card slot
No
Internal
128GB 8GB RAM, 256GB 8GB RAM
UFS 3.1
MAIN CAMERA
Camera
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@30/60/240fps, 720p@960fps, HDR10+, stereo sound rec., gyro-EIS
FRONT CAMERA
Camera
10 MP, f/2.2, 26mm (wide), 1/3.24", 1.22µm, Dual Pixel PDAF
Features
Dual video call, Auto-HDR
Video
4K@30/60fps, 1080p@30fps
SOUND
Loudspeaker
Yes, with stereo speakers
3.5mm jack
No
32-bit/384kHz audio
Tuned by AKG
COMMUNICATES
WLAN
Wi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi Direct, hotspot
Bluetooth
5.0, A2DP, LE
GPS
Yes, with A-GPS, GLONASS, BDS, GALILEO
NFC
Yes
Radio
FM radio (Snapdragon model only; market/operator dependent)
USB
USB Type-C 3.2, USB On-The-Go
FEATURES
Sensors
Fingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compass, barometer
Samsung DeX, Samsung Wireless DeX (desktop experience support)
Bixby natural language commands and dictation
Samsung Pay (Visa, MasterCard certified)
BATTERY
Battery
Li-Ion 4000 mAh, non-removable
Charging
Fast charging 25W
USB Power Delivery 3.0
Fast Qi/PMA wireless charging 15W
Reverse wireless charging 4.5W
MISC
Colors
Phantom Gray, Phantom White, Phantom Violet, Phantom Pink
SAR US
0.74 W/kg (head)     1.08 W/kg (body)    
SAR EU
0.46 W/kg (head)     1.51 W/kg (body)    
Performance
AnTuTu: 584055 (v8)
GeekBench: 3238 (v5.1)
GFXBench: 60fps (ES 3.1 onscreen)
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Specs source: gsmarena.com
Disclaimer. We can not guarantee that the information on this page is 100% correct

Filter firmware

Samsung firmware SM-G991U1 / Galaxy S21 SM-G991U1 61

Device CSC Version Bit/SW REV. Security Patch Lvl. OS Build date
Samsung Galaxy S21 ATT G991U1UESDGXJ1 D  2024-10-01  Full Files U(Android 14) 20241009182940
Samsung Galaxy S21 ATT G991U1UESCGXH1 C  2024-09-01  Full Files U(Android 14) 20240830133611
Samsung Galaxy S21 ATT G991U1UEUCGXGB C  2024-08-01  Full Files U(Android 14) 20240729151400
Samsung Galaxy S21 ATT G991U1UESCGXF3 C  2024-07-01  Full Files U(Android 14) 20240702135450
Samsung Galaxy S21 ATT G991U1UESBGXF1 B  2024-06-01  Full Files U(Android 14) 20240607140440
Samsung Galaxy S21 ATT G991U1UESBGXE1 B  2024-05-01  Full Files U(Android 14) 20240515015720
Samsung Galaxy S21 ATT G991U1UEUAGXDE A  2024-04-01  Full Files U(Android 14) 20240419223300
Samsung Galaxy S21 ATT G991U1UESAFXD1 A  2024-04-01  Full Files U(Android 14) 20240404145240
Samsung Galaxy S21 ATT G991U1UESAFXBC A  2024-03-01  Full Files U(Android 14) 20240306233420
Samsung Galaxy S21 ATT G991U1UESAFXAB A  2024-02-01  Full Files U(Android 14) 20240201143350
Samsung Galaxy S21 ATT G991U1UES9FXA1 9  2024-01-01  Full Files U(Android 14) 20240108163030
Samsung Galaxy S21 ATT G991U1UEU9FWL3 9  2023-12-01  Full Files U(Android 14) 20231213135010
Samsung Galaxy S21 ATT G991U1UEU9EWL2 9  2023-12-01  Full Files T(Android 13) 20231209182552
Samsung Galaxy S21 ATT G991U1UES9EWK1 9  2023-11-01  Full Files T(Android 13) 20231108131611
Samsung Galaxy S21 ATT G991U1UES9EWI3 9  2023-10-01  Full Files T(Android 13) 20231005192500
Samsung Galaxy S21 ATT G991U1UEU9EWI2 9  2023-09-01  Full Files T(Android 13) 20230918212310
Samsung Galaxy S21 ATT G991U1UES9EWI1 9  2023-09-01  Full Files T(Android 13) 20230912144210
Samsung Galaxy S21 ATT G991U1UES8EWG3 8  2023-08-01  Full Files T(Android 13) 20230801160240
Samsung Galaxy S21 ATT G991U1UES8EWF6 8  2023-07-01  Full Files T(Android 13) 20230707141740
Samsung Galaxy S21 ATT G991U1UEU7EWF4 7  2023-06-01  Full Files T(Android 13) 20230619190511
Samsung Galaxy S21 ATT G991U1UES7EWE1 7  2023-06-01  Full Files T(Android 13) 20230526195111
Samsung Galaxy S21 ATT G991U1UES6EWD6 6  2023-05-01  Full Files T(Android 13) 20230420212340
Samsung Galaxy S21 ATT G991U1UEU6EWD1 6  2023-04-01  Full Files T(Android 13) 20230411152910
Samsung Galaxy S21 ATT G991U1UES6EWC9 6  2023-04-01  Full Files T(Android 13) 20230328192540
Samsung Galaxy S21 ATT G991U1UES5EWB5 5  2023-03-01  Full Files T(Android 13) 20230227174340
Samsung Galaxy S21 ATT G991U1UES5DWB2 5  2023-02-01  Full Files T(Android 13) 20230210134241
Samsung Galaxy S21 ATT G991U1UEU5EWB1 5  2023-02-01  Full Files T(Android 13) 20230214134141
Samsung Galaxy S21 ATT G991U1UES5DWA4 5  2023-01-01  Full Files T(Android 13) 20230124150541
Samsung Galaxy S21 ATT G991U1UES5DWA2 5  2022-12-01  Full Files T(Android 13) 20230106190141
Samsung Galaxy S21 ATT G991U1UEU5DVL1 5  2022-11-01  Full Files T(Android 13) 20221206125531
Samsung Galaxy S21 ATT G991U1UES5CVI8 5  2022-10-01  Full Files S(Android 12) 20220919181720
Samsung Galaxy S21 ATT G991U1UES5CVHB 5  2022-09-01  Full Files S(Android 12) 20220831133650
Samsung Galaxy S21 ATT G991U1UEU5CVH9 5  2022-08-01  Full Files S(Android 12) 20220820070721
Samsung Galaxy S21 ATT G991U1UEU5CVGB 5  2022-08-01  Full Files S(Android 12) 20220728083820
Samsung Galaxy S21 ATT G991U1UEU5CVG9 5  2022-07-01  Full Files S(Android 12) 20220722052910
Samsung Galaxy S21 ATT G991U1UES5CVF5 5  2022-07-01  Full Files S(Android 12) 20220627085354
Samsung Galaxy S21 ATT G991U1UEU5CVF1 5  2022-06-01  Full Files S(Android 12) 20220608084320
Samsung Galaxy S21 ATT G991U1UEU5CVDC 5  2022-05-01  Full Files S(Android 12) 20220422135040
Samsung Galaxy S21 ATT G991U1UES5CVCB 5  2022-04-01  Full Files S(Android 12) 20220325100330
Samsung Galaxy S21 ATT G991U1UEU5CVC4 5  2022-03-01  Full Files S(Android 12) 20220310031931
Samsung Galaxy S21 ATT G991U1UES5BVC1 5  2022-03-01  Full Files S(Android 12) 20220305090340
Samsung Galaxy S21 ATT G991U1UES5BVA6 5  2022-02-01  Full Files S(Android 12) 20220127114600
Samsung Galaxy S21 ATT G991U1UEU5BULH 5  2022-01-01  Full Files S(Android 12) 20220104155301
Samsung Galaxy S21 ATT G991U1UES4BULE 4  2022-01-01  Full Files S(Android 12) 20211228105630
Samsung Galaxy S21 ATT G991U1UES4BUKK 4  2021-12-01  Full Files S(Android 12) 20211222075900
Samsung Galaxy S21 ATT G991U1UEU4BUKF 4  2021-11-01  Full Files S(Android 12) 20211123074800
Samsung Galaxy S21 ATT G991U1UEU4BUK7 4  2021-11-01  Full Files S(Android 12) 20211105233901
Samsung Galaxy S21 ATT G991U1UES4AUJ7 4  2021-11-01  Full Files R(Android 11) 20211020155619
Samsung Galaxy S21 ATT G991U1UES4AUIN 4  2021-10-01  Full Files R(Android 11) 20210929144807
Samsung Galaxy S21 ATT G991U1UEU4AUI7 4  2021-09-01  Full Files R(Android 11) 20210907101734
Samsung Galaxy S21 ATT G991U1UES4AUH9 4  2021-09-01  Full Files R(Android 11) 20210817103906
Samsung Galaxy S21 ATT G991U1UEU4AUGQ 4  2021-08-01  Full Files R(Android 11) 20210803081218
Samsung Galaxy S21 ATT G991U1UES4AUFD 4  2021-07-01  Full Files R(Android 11) 20210621194838
Samsung Galaxy S21 ATT G991U1UEU4AUF5 4  2021-06-01  Full Files R(Android 11) 20210605080508
Samsung Galaxy S21 ATT G991U1UES3AUE3 3  2021-06-01  Full Files R(Android 11) 20210514131607
Samsung Galaxy S21 ATT G991U1UEU3AUDD 3  2021-05-01  Full Files R(Android 11) 20210501121136
Samsung Galaxy S21 ATT G991U1UEU2AUC8 2  2021-04-01  Full Files R(Android 11) 20210319174805
Samsung Galaxy S21 ATT G991U1UEU2AUB6 2  2021-03-01  Full Files R(Android 11) 20210225092235
Samsung Galaxy S21 ATT G991U1UEU1AUAG 1  2021-02-01  Full Files R(Android 11) 20210201082405
Samsung Galaxy S21 ATT G991U1UEU1AUA3 1  2021-01-01  Full Files R(Android 11) 20210106145735
Samsung Galaxy S21 ATT G991U1UEU1ATLI 1  Full Files R(Android 11) 20201216093034
Lastest combinations SM-G991U1 / Galaxy S21 SM-G991U1

We are working hard to figure it out

You can request or contribute combination for this model to Telegram group

 How to flash Samsung SM-G991U1 / Galaxy S21 SM-G991U1 firmware

1. Extract (unzip) the Samsung firmware file. Recommended using WinRAR or 7-Zip

2. Download Odin Tool 3.13.1

3. Extract Odin ZIP file

4. Open Odin execute file

5. Reboot Samsung phone in Download Mode (hold Home + Power + Volume Down buttons / hold Volume Down + Bixby buttons then plug-in cable)

6. Connect you Samsung phone and wait until you get a blue sign in Odin

7. Add the 1 file Samsung firmware to AP/PDA or 4 files Samsung firmware (AP/BL/CP/CSC) to it's slots

8. Make sure re-partition is NOT ticked

9. Click the START button, sit back and wait few minutes

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