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Samsung Galaxy S21 5G
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Phone Insight
Full Specifications September 5, 2026
Samsung · 2021

Samsung Galaxy S21 5G

Samsung Galaxy S21 5G Android smartphone. Announced Jan 2021. Features 6.2″ display, Exynos 2100 chipset, 4000 mAh battery, 256 GB storage, 8 GB RAM, Corning Gorilla Glass Victus.

Display 6.2"
Chipset Exynos 2100
RAM 6/8 GB
Storage 128GB/256GB storage, no card slot
Camera 64 MP
Battery 4000 mAh
Build 169g (Sub6), 171g (mmWave), 7.9mm thickness

Launch

Announced 2021, January 14
Status Available. Released 2021, January 29

Platform

OS Android 11, up to 4 major OS updates, 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

Display

Type Dynamic AMOLED 2X, 120Hz, HDR10+, 1300 nits (peak)
Size 6.2 inches, 94.1 cm 2 (~87.2% screen-to-body ratio)
Resolution 1080 x 2400 pixels, 20:9 ratio (~421 ppi density)
Protection Corning Gorilla Glass Victus

Memory

Card slot No
Internal 128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM
memoryother 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

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)
bodyother IP68 dust tight and water resistant (immersible up to 1.5m for 30 min)

Battery

Type Li-Ion 4000 mAh
Charging 25W wired, PD3.0 15W wireless (Qi) 4.5W reverse wireless

Sound

Loudspeaker Yes, with stereo speakers
3.5mm jack No
optionalother 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

Network

Technology GSM / CDMA / HSPA / EVDO / LTE / 5G
2G bands GSM 850 / 900 / 1800 / 1900
3G bands HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
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
5G bands 2, 5, 25, 41, 66, 71, 260, 261 SA/NSA/Sub6/mmWave - SM-G991U1
Speed HSPA 42.2/5.76 Mbps, LTE (7CA) Cat20 2000/200 Mbps, 5G (5+ Gbps DL)

Features

Sensors Fingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compass, barometer
featuresother Samsung DeX, Samsung Wireless DeX (desktop experience support)

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

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)
In depth

Full specifications

Announced 2021, January 14
Status Available. Released 2021, January 29
OS Android 11, up to 4 major OS updates, 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
Type Dynamic AMOLED 2X, 120Hz, HDR10+, 1300 nits (peak)
Size 6.2 inches, 94.1 cm 2 (~87.2% screen-to-body ratio)
Resolution 1080 x 2400 pixels, 20:9 ratio (~421 ppi density)
Protection Corning Gorilla Glass Victus
Card slot No
Internal 128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM
memoryother UFS 3.1
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
Single 10 MP, f/2.2, 26mm (wide), 1/3.24", 1.22µm, dual pixel PDAF
Features HDR
Video 4K@30/60fps, 1080p@30fps
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)
bodyother IP68 dust tight and water resistant (immersible up to 1.5m for 30 min)
Type Li-Ion 4000 mAh
Charging 25W wired, PD3.0 15W wireless (Qi) 4.5W reverse wireless
Loudspeaker Yes, with stereo speakers
3.5mm jack No
optionalother High-bitrate audio support
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
Technology GSM / CDMA / HSPA / EVDO / LTE / 5G
2G bands GSM 850 / 900 / 1800 / 1900
3G bands HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
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
5G bands 2, 5, 25, 41, 66, 71, 260, 261 SA/NSA/Sub6/mmWave - SM-G991U1
Speed HSPA 42.2/5.76 Mbps, LTE (7CA) Cat20 2000/200 Mbps, 5G (5+ Gbps DL)
Sensors Fingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compass, barometer
featuresother Samsung DeX, Samsung Wireless DeX (desktop experience support)
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
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 $ 174.44 / € 210.00 / £ 161.00
PhoneInsight Benchmark
74.9/100
Premium

A specs-derived composite score, not a lab benchmark -- useful for ranking and comparison.

Processor 74
Display 80.7
Camera 83.6
Battery 66.8
9.8%Popularity rank
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