Samsung Galaxy S21 Ultra 512GB Specifications

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

Key Specs
RAM & Storage 12 GB RAM + 256 GB
16 GB RAM + 512 GB
Processor Samsung Exynos 2100
Rear Camera 108 MP + 12 MP + 10 MP + 10 MP
Front Camera 40 MP
Battery 5000 mAh
Display 6.8 inches (17.27 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 12 GB / 16 GB
RAM Type LPDDR5
Performance Test Results icon View AnTuTu Score
AnTuTu Score 646,482
Bootup Time 34.0 s
Speed Test (Antutu Score)
The higher, the better
OPPO Find X9 Ultra 4,033,382 
vivo X300 Ultra 3,977,648 
Samsung Galaxy S26 Ultra 3,905,605 
vivo X300 Pro 3,536,552 
Apple iPhone 17 Pro Max 2,521,699 
Samsung Galaxy S25 Ultra 2,209,231 
Samsung Galaxy S21 Ultra 512GB 646,482 
*Group: 90-230k Phones
See comparison with other phones
Bootup Time
The lower, the better
Google Pixel 10 Pro XL 10 s
Samsung Galaxy S26 Ultra 11 s
vivo X300 Ultra 14 s
Samsung Galaxy S25 Ultra 14 s
OPPO Find X9 Ultra 14 s
Apple iPhone 17 Pro Max 17 s
Samsung Galaxy S21 Ultra 512GB 34 s
*Group: 90-230k Phones
See comparison with other phones
Gaming Test Results icon
Battery Drain* 8.0 %
Heating* 23.5 %
* after 30 mins of gaming
Battery Drain*
The lower, the better
Apple iPhone 17 Pro Max 3 %
OPPO Find X9 Ultra 4 %
Samsung Galaxy S25 Ultra 5 %
vivo X300 Ultra 7 %
Samsung Galaxy S26 Ultra 8 %
Samsung Galaxy S21 Ultra 512GB 8 %
Google Pixel 10 Pro 11 %
*Group: 90-230k Phones
See comparison with other phones
Heating*
The lower, the better
Samsung Galaxy Z Flip7 8.6 %
OPPO Find X9 Ultra 9.1 %
Samsung Galaxy S26 Ultra 14.1 %
vivo X300 Ultra 21.7 %
Samsung Galaxy S25 Ultra 22.5 %
Samsung Galaxy S21 Ultra 512GB 23.5 %
Apple iPhone 15 Pro Max 43.2 %
*Group: 90-230k 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 6.8 inches (17.27 cm)
Resolution 1440x3200 px (QHD+)
Brightness 1500 nits
Refresh Rate 120 Hz
Aspect Ratio 20:9
Pixel Density 516 ppi
Screen to Body Ratio (calculated) 89.44 %
Screen Protection Corning Gorilla Glass
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 165.1 mm
Width 75.6 mm
Thickness 8.9 mm
Weight 227 grams
Build Material Back: Gorilla Glass
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

(Excellent)
Resolution
CameraMPApertureLens FeaturesFocal LengthSensor SizeSensor NamePixel SizeZoom
Primary108 MPf/1.8Wide Angle26 mm1/1.33" Samsung ISOCELL Plus S5KHM30.8µm
Secondary12 MPf/2.2Ultra-Wide Angle13 mm 1/2.55" 1.4µm
Tertiary10 MPTelephoto72 mm1/3.24" 1.22µmupto 3x Optical Zoom
Quaternary10 MPf/4.9240 mm1/3.24" 1.22µmupto 10x Optical Zoom
Autofocus Yes, Phase Detection Autofocus, Laser Autofocus
OIS Yes
Flash Yes, LED Flash
Image Resolution 12000 x 9000 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
Video HDR
Bokeh portrait video
Video Pro Mode
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 Ultra 512GB Compare Camera Samples

camera-sample-1
Samsung Galaxy S21 Ultra 512GB 108 MP
VS
camera-sample-2
Apple iPhone 12 Pro Max 12 MP
Samsung Galaxy S21 Ultra 512GB
Apple iPhone 12 Pro Max
Samsung Galaxy S21 Ultra 512GB
Apple iPhone 12 Pro Max
Samsung Galaxy S21 Ultra 512GB
Apple iPhone 12 Pro Max
Samsung Galaxy S21 Ultra 512GB
Apple iPhone 12 Pro Max
Samsung Galaxy S21 Ultra 512GB
Apple iPhone 12 Pro Max
Samsung Galaxy S21 Ultra 512GB
Apple iPhone 12 Pro Max
Samsung Galaxy S21 Ultra 512GB
Apple iPhone 12 Pro Max
Samsung Galaxy S21 Ultra 512GB
Apple iPhone 12 Pro Max
Samsung Galaxy S21 Ultra 512GB
Apple iPhone 12 Pro Max

Front Camera

(Excellent)
Resolution
CameraMPApertureLens FeaturesFocal LengthSensor SizeSensor NamePixel Size
Primary40 MPf/2.2Wide Angle26 mm1/2.8"Samsung S5KGH10.7µm
Autofocus Yes, Phase Detection Autofocus
Video Recording 3840x2160 @ 30 fps
1920x1080 @ 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 5000 mAh
Battery Type Li-ion
TalkTime Up to 41 Hours(4G)
Quick Charging Yes, 25W Fast Charging
Wireless Charging Yes
Wireless Reverse Charging Yes
Battery Test Results icon
Battery Life (PC Mark) 10h 37m
Charging Time (20% to 100%) 55m 14s
Battery Life (PC Mark)
The higher, the better
OPPO Find X9 Ultra 17.1 hrs
Samsung Galaxy S24 Ultra 16.3 hrs
vivo X300 Pro 16.0 hrs
vivo X300 Ultra 15.2 hrs
Samsung Galaxy S26 Ultra 14.4 hrs
Samsung Galaxy S25 Ultra 13.9 hrs
Samsung Galaxy S21 Ultra 512GB 10.6 hrs
*Group: 90-230k Phones
See comparison with other phones
Charging Time (20% to 100%)
The lower, the better
vivo X300 Ultra 0.6 hrs
Samsung Galaxy S26 Ultra 0.6 hrs
Samsung Galaxy S25 Ultra 0.7 hrs
OPPO Find X9 Ultra 0.8 hrs
Samsung Galaxy S21 Ultra 512GB 0.9 hrs
Apple iPhone 17 Pro Max 1.3 hrs
Samsung Galaxy S24 Ultra 2.1 hrs
*Group: 90-230k Phones
See comparison with other phones

Storage
Internal Storage 256 GB / 512 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 / N66
TDD N38 / N40 / N41 / 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: 0.77 W/kg, Body: 1.02 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, v5.2
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 Ultra 512GB› Samsung Galaxy S21 Ultra 512GB Specifications
Updated on: June 4, 2026