Samsung Galaxy S21 256GB Specifications

Key Specs General Performance Display Design Rear Camera Front Camera Battery Storage Network & Connectivity Multimedia Sensors

Key Specs
RAM & Storage 8 GB RAM + 128 GB
8 GB RAM + 256 GB
Processor Samsung Exynos 2100
Rear Camera 12 MP + 64 MP + 12 MP
Front Camera 10 MP
Battery 4000 mAh
Display 6.2 inches (15.75 cm)

General
Operating System Android v11
Custom UI Samsung One UI

Performance

(Very Good)
Chipset Samsung Exynos 2100
Processor Octa core (2.9 GHz, Single core, Cortex X1 + 2.8 GHz, Tri core, Cortex A78 + 2.2 GHz, Quad core, Cortex A55)
Architecture 64 bit
Fabrication 5 nm
Graphics (GPU) Mali-G78 MP14
RAM 8 GB
RAM Type LPDDR5
Performance Test Results icon View AnTuTu Score
AnTuTu Score 639,170
Bootup Time 18.0 s
Speed Test (Antutu Score)
The higher, the better
iQOO Neo 10 2,066,325 
Motorola Edge 60 Pro 1,440,382 
Motorola Edge 70 Fusion 1,149,292 
OnePlus Nord CE 6 Lite 5G 1,015,733 
Samsung Galaxy A27 5G 845,601 
Samsung Galaxy S21 256GB 639,170 
realme 15T 448,625 
*Group: 22-34k Phones
See comparison with other phones
Bootup Time
The lower, the better
Wobble One 14 s
Samsung Galaxy S21 256GB 18 s
Motorola Edge 70 Fusion 18 s
Motorola Edge 60 Pro 20 s
Samsung Galaxy A27 5G 25 s
OnePlus Nord CE 6 Lite 5G 26 s
realme 15T 34 s
*Group: 22-34k Phones
See comparison with other phones
Gaming Test Results icon
Battery Drain* 9.0 %
Heating* 19.5 %
* after 30 mins of gaming
Battery Drain*
The lower, the better
vivo T4 3 %
Motorola Edge 60 Pro 5 %
Motorola Edge 70 Fusion 5 %
OnePlus Nord CE 6 Lite 5G 7 %
Motorola Edge 70 9 %
Samsung Galaxy S21 256GB 9 %
Wobble One 10 %
*Group: 22-34k Phones
See comparison with other phones
Heating*
The lower, the better
Xiaomi Redmi Note 15 Pro 3.2 %
OnePlus Nord CE 6 Lite 5G 16.9 %
Motorola Edge 70 Fusion 19.0 %
Samsung Galaxy S21 256GB 19.5 %
Motorola Edge 60 Pro 22.1 %
Motorola Edge 70 24.2 %
OPPO F29 50.2 %
*Group: 22-34k Phones
See comparison with other phones
Benchmark Screenshots
Benchmarks
AnTuTu Benchmark
Benchmarks
Graphics Benchmark
Benchmarks
GeekBench5 Benchmark
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Display

(Excellent)
Display Type Dynamic AMOLED 2x
Screen Size 6.2 inches (15.75 cm)
Resolution 1080x2400 px (FHD+)
Brightness 1300 nits
Refresh Rate 120 Hz
Aspect Ratio 20:9
Pixel Density 424 ppi
Screen to Body Ratio (calculated) 85.92 %
Screen Protection Corning Gorilla Glass, Glass Victus
Bezel-less Display Yes with punch-hole display
HDR 10 / HDR+ Support Yes, HDR 10+
UI Screenshots
UI Screenshot
Lock Screen
UI Screenshot
Home Screen
UI Screenshot
Screen With Widgets
UI Screenshot
Dialer Screen
UI Screenshot
App Drawer
UI Screenshot
Notification Panel
UI Screenshot
Quick Settings Panel
UI Screenshot
Settings Screen
UI Screenshot
OS Version
UI Screenshot
Storage
UI Screenshot
Battery
UI Screenshot
Camera On
UI Screenshot
Camera Options
UI Screenshot
Camera Modes
UI Screenshot
Camera Settings
UI Screenshot
Picture Size Options
UI Screenshot
Video Size Options

Design
Height 151.7 mm
Width 71.2 mm
Thickness 7.9 mm
Weight 169 grams
Build Material Back: Plastic
Water Resistance Yes, Water resistant, IP68, (up to 30 minutes in a depth of 1.5 meter)
Ruggedness Dust proof
Click to View Click to View

Rear Camera

(Very Good)
Resolution
CameraMPApertureLens FeaturesFocal LengthSensor SizePixel SizeZoom
Primary12 MPf/1.8Wide Angle26 mm1/1.7" 1.8µm
Secondary64 MPf/2.0Telephoto28 mm 1/1.7" 0.8µmupto 30x Digital Zoom, upto 1.1x Optical Zoom
Tertiary12 MPf/2.2Ultra-Wide Angle13 mm1/2.55" 1.4µm
Autofocus Yes, Phase Detection Autofocus, Dual Pixel Autofocus
OIS Yes
Flash Yes, LED Flash
Image Resolution 4000 x 3000 Pixels
Settings Exposure compensation, ISO control
Shooting Modes Continuous Shooting
High Dynamic Range mode (HDR)
Camera Features Digital Zoom
Auto Flash
Face detection
Touch to focus
Video Recording 7680x4320 @ 24 fps
3840x2160 @ 30 fps
1920x1080 @ 60 fps
1280x720 @ 960 fps
Video Recording Features Slow Motion
Bokeh portrait video
Video Pro Mode
Stereo recording
Rear Camera Samples
Rear Camera
Wide Angle
Rear Camera
Portrait Shot
Rear Camera
Night Mode OFF
Rear Camera
Night Mode ON
Rear Camera
Close Up
Rear Camera
Low Light
Rear Camera
Low Light With Flash
Rear Camera
Colour Variance
Rear Camera
Daylight Auto / HDR OFF
Rear Camera
Daylight / HDR ON
Rear Camera
AI OFF
Rear Camera
AI ON
Rear Camera
Macro

Samsung Galaxy S21 256GB Compare Camera Samples

camera-sample-1
Samsung Galaxy S21 256GB 12 MP
VS
camera-sample-2
Apple iPhone 12 256GB 12 MP
Samsung Galaxy S21 256GB
Apple iPhone 12 256GB
Samsung Galaxy S21 256GB
Apple iPhone 12 256GB
Samsung Galaxy S21 256GB
Apple iPhone 12 256GB
Samsung Galaxy S21 256GB
Apple iPhone 12 256GB
Samsung Galaxy S21 256GB
Apple iPhone 12 256GB
Samsung Galaxy S21 256GB
Apple iPhone 12 256GB
Samsung Galaxy S21 256GB
Apple iPhone 12 256GB
Samsung Galaxy S21 256GB
Apple iPhone 12 256GB
Samsung Galaxy S21 256GB
Apple iPhone 12 256GB

Front Camera

(Very Good)
Resolution
CameraMPApertureLens FeaturesFocal LengthSensor SizePixel Size
Primary10 MPf/2.2Wide Angle26 mm1/3.2"1.22µm
Autofocus Yes, Phase Detection Autofocus
Video Recording 3840x2160 @ 30 fps
Front Camera Samples
Front Camera
Selfie
Front Camera
Selfie Portrait
Front Camera
Selfie Low Light
Front Camera
Selfie Low Light With Flash

Battery

(Very Good)
Capacity 4000 mAh
Battery Type Li-ion
TalkTime Up to 33 Hours(4G)
Quick Charging Yes, 25W Fast Charging
Wireless Charging Yes
Wireless Reverse Charging Yes
Battery Test Results icon
Battery Life (PC Mark) 8h 22m
Charging Time (20% to 100%) 1h 47s
Battery Life (PC Mark)
The higher, the better
realme P4 Power 21.1 hrs
Motorola Edge 70 Fusion 17.6 hrs
OnePlus Nord CE 6 Lite 5G 17.1 hrs
Samsung Galaxy A27 5G 11 hrs
Motorola Edge 60 Pro 8.5 hrs
Samsung Galaxy S21 256GB 8.4 hrs
Lava Agni 4 6.6 hrs
*Group: 22-34k Phones
See comparison with other phones
Charging Time (20% to 100%)
The lower, the better
OPPO F29 0.1 hrs
Motorola Edge 60 Pro 0.6 hrs
Motorola Edge 70 0.7 hrs
Motorola Edge 70 Fusion 0.8 hrs
Samsung Galaxy S21 256GB 1.0 hrs
Samsung Galaxy A27 5G 1.2 hrs
OPPO K13 Turbo Pro 3.3 hrs
*Group: 22-34k Phones
See comparison with other phones

Storage
Internal Storage 128 GB / 256 GB
Storage Type UFS 3.1
Expandable Storage No

Network & Connectivity
SIM Slot(s) Dual SIM
SIM Type SIM1: Nano, SIM2: Nano
Network Support 5G, 4G
VoLTE Yes
SIM 1 5G bands, 4G bands
Expand
Bands Features
5G bandsFDD N1 / N3 / N5 / N7 / N8 / N20 / N28
TDD N38 / N40 / N41 / N66 / N77 / N78
4G bandsTD-LTE 2600(band 38) / 2300(band 40) / 2500(band 41) / 1900(band 39)
FD-LTE 2100(band 1) / 1800(band 3) / 2600(band 7) / 900(band 8) / 700(band 28) / 1900(band 2) / 1700(band 4) / 850(band 5) / 700(band 13) / 700(band 17) / 850(band 18) / 850(band 19) / 800(band 20) / 1900(band 25) / 850(band 26)
SIM 2 4G bands
Expand
Bands Features
4G bandsTD-LTE 2600(band 38) / 2300(band 40) / 2500(band 41) / 1900(band 39)
FD-LTE 2100(band 1) / 1800(band 3) / 2600(band 7) / 900(band 8) / 700(band 28) / 1900(band 2) / 1700(band 4) / 850(band 5) / 700(band 13) / 700(band 17) / 850(band 18) / 850(band 19) / 800(band 20) / 1900(band 25) / 850(band 26)
SAR Value Head: 0.74 W/kg, Body: 1.08 W/kg
Wi-Fi Yes, Wi-Fi 6 (802.11 a/b/g/n/ac/ax) 5GHz, MIMO
Wi-Fi Features Wi-Fi Direct, Mobile Hotspot
Bluetooth Yes, v5.0
GPS Yes with A-GPS, Glonass
NFC Yes

Multimedia
Stereo Speakers Yes
Audio Jack USB Type-C

Sensors
Fingerprint Sensor Yes
Fingerprint Sensor Position On-screen
Fingerprint Sensor Type Ultrasonic
Other Sensors Light sensor, Proximity sensor, Accelerometer, Barometer, Compass, Gyroscope
Mobiles› Samsung Galaxy S21 256GB› Samsung Galaxy S21 256GB Specifications
Updated on: July 22, 2026