New Release Updated: Mar 2026

Samsung Galaxy S21 5G

Name: Samsung Galaxy S21 5G
Brand: Samsung
Price: 257 USD
Availability: InStock

$257 (Expected Price)

Reviewed by the MobGadgets Tech Team

We analyze specs, compare pricing, and aggregate real-world data to bring you unbiased mobile reviews. Learn how we test.

Display 6.2" AMOLED

Processor Exynos 2100

Battery 4000mAh

RAM & Storage 128GB/256GB storage, no card slot

Full Specs

Should you buy the Samsung Galaxy S21 5G?

Reasons to Buy

Massive The Samsung Galaxy S21 5G comes with a non-removable Li-Ion 4000 mAh battery, which provides a decent amount of power for daily use. The battery life of the device is quite impressive, with an endurance rating of 93 hours. This means that the phone can last for an extended period without needing to be charged. Additionally, the battery supports fast charging, with a 25W wired charger and 15W wireless charging options available. This allows users to quickly recharge their device and get back to using it. The S21 5G also has power efficiency and optimization features, which help to conserve battery life and improve overall performance. With its battery management system, users can monitor and control their battery usage, ensuring that the device lasts longer and performs optimally. Overall, the battery performance of the Samsung Galaxy S21 5G is reliable, providing users with a long-lasting and efficient power source for their daily needs. battery life
Large 6.7" display for media
Excellent value at $257

Reasons to Avoid

May be bulky due to large battery
Average camera performance in low light

Full Specifications

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

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 and eSIM or Dual SIM (2 Nano-SIMs and eSIM, dual stand-by) - : IP68 dust/water resistant (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 - : Always-on display

Platform OS: Android 11, upgradable to Android 14, One UI 6 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 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@30/60/240fps, 720p@960fps, 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: 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

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, non-removable Charging: 25W wired, PD3.0
15W wireless (Qi/PMA)
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: € 259.22 / $ 212.99 / £ 217.49

Tests Performance: AnTuTu: 584055 (v8)
GeekBench: 3238 (v5.1)
GFXBench: 60fps (ES 3.1 onscreen)
Display: Contrast ratio: Infinite (nominal)
Camera: Photo / Video
Loudspeaker: -26.4 LUFS (Good)
Battery (old):
Endurance rating 93h

Frequently Asked Questions

With its Dimensity 6300 chipset and 6GB of RAM, it handles everyday tasks and moderate gaming efficiently, though extremely graphic-intensive games may require lower settings.

Yes, to complement its massive The Samsung Galaxy S21 5G comes with a non-removable Li-Ion 4000 mAh battery, which provides a decent amount of power for daily use. The battery life of the device is quite impressive, with an endurance rating of 93 hours. This means that the phone can last for an extended period without needing to be charged. Additionally, the battery supports fast charging, with a 25W wired charger and 15W wireless charging options available. This allows users to quickly recharge their device and get back to using it. The S21 5G also has power efficiency and optimization features, which help to conserve battery life and improve overall performance. With its battery management system, users can monitor and control their battery usage, ensuring that the device lasts longer and performs optimally. Overall, the battery performance of the Samsung Galaxy S21 5G is reliable, providing users with a long-lasting and efficient power source for their daily needs. battery, it features standard fast charging capabilities to get you back up and running quickly.