Samsung Galaxy S21 Ultra vs realme 8 5G Specs Comparison

Compare mobile phone specifications of up to three devices at once. Our specs comparison tool helps you find and compare the perfect phone for your needs.

9.1
Samsung Galaxy S21 Ultra
Samsung Galaxy S21 Ultra realme 8 5G
Released · Jan 29, 2021
Released · Apr 28, 2021
6.8-inch · 3200x1440px
6.5-inch · 2400x1080px
Quad camera
Triple camera
12GB · 128GB
4GB · 128GB
5000 mAh
5000 mAh
Check prices

Design

Dimensions
6.50 x 2.98 x 0.35 inches (~0.37 inches with camera bump)
165.1 x 75.6 x 8.9 mm (~9.4 mm with camera bump)
6.40 x 2.94 x 0.33 inches
162.5 x 74.8 x 8.5 mm
Weight
8.04 oz (229.0 g) 6.53 oz (185.0 g)
Materials
Back: Glass (Corning Gorilla Glass Victus)
Frame: Aluminum
Resistance
Water, Dust; IP68
Biometrics
2D Face unlock, Ultrasonic in-screen fingerprint Fingerprint (touch)
Keys
Right: Volume control, Lock/Unlock key Left: Volume control; Right: Lock/Unlock key
Colors
Phantom black, Silver Supersonic blue, Supersonic Black

Display

Size
6.8-inch 6.5-inch
Resolution
3200x1440px, 20:9 ratio, 516 PPI 2400x1080px, 20:9 ratio, 405 PPI
Technology
Dynamic AMOLED IPS LCD
Refresh rate
120Hz (adaptable) 90Hz
Screen-to-body
89.33 % 84.03 %
Peak brightness
1500 cd/m2 (nit) 600 cd/m2 (nit)
Features
HDR support, Scratch-resistant glass (Corning Gorilla Glass Victus), Ambient light sensor, Proximity sensor Ambient light sensor, Proximity sensor

Hardware

System chip
Qualcomm Snapdragon 888 SM8350 (5 nm) MediaTek Dimensity 700 MT6833V (7 nm)
Processor
Octa-core
1x 2.84GHz Kryo 680 + 3x 2.42GHz Kryo 680 + 4x 1.80GHz Kryo 680
Octa-core
2200 MHz
Cortex-A76
GPU
Adreno 660 Mali-G57
Memory
12GB (LPDDR5)/128GB (UFS 3.1) 4GB (LPDDR4)/128GB (UFS 2.1)
Storage expansion
not expandable microSDXC up to 1024 GB
OS
Android (14, 13, 12, 11) Android (11)

Battery

Type
5000 mAh, Li - Polymer 5000 mAh, Li - Polymer
Charging
Qualcomm Quick Charge 2.0, USB Power Delivery, Samsung Adaptive Fast Charging
Qi and Powermat wireless charging, Reverse wireless charging
Fast charging
Charge speed
Wired: 25.0W
Wireless: 15.0W
Wired: 18.0W
PhoneArena Battery Tests
Battery Life Estimate
6h 15min
Browsing
14h 43min
Video
8h 52min
Gaming
8h 40min
Battery Life Estimate
Untested
Browsing
Untested
Video
Untested
Gaming
Untested

Camera

Rear
Quad camera Triple camera
Main camera
108 MP (OIS, Laser and PDAF)
Aperture size: F1.8
Focal length: 24 mm
Sensor size: 1/1.33"
Pixel size: 0.8 μm
48 MP (PDAF)
Aperture size: F1.8
Focal length: 26 mm
Second camera
12 MP (Ultra-wide, PDAF)
Aperture size: F2.2
Focal Length: 13 mm
Sensor size: 1/2.55"
Pixel size: 1.4 μm
2 MP (Macro)
Aperture size: F3.4
Third camera
10 MP (Telephoto, OIS, PDAF)
Optical zoom: 3.0x
Aperture size: F2.4
Focal Length: 70 mm
Sensor size: 1/3.2"
Pixel size: 1.22 μm
2 MP (Black and White)
Aperture size: F2.4
Fourth camera
10 MP (Telephoto, Periscope, OIS, PDAF)
Optical zoom: 3.0x
Aperture size: F2.4
Focal Length: 70 mm
Sensor size: 1/3.2"
Pixel size: 1.22 μm
Flash
LED LED
Video recording
8K UHD (24 fps), 4K UHD (60 fps), 1080p (240 fps), 720p (960 fps)
OIS, HDR, Hyperlapse, Video light, EIS
1080p (30 fps), 720p (120 fps)
Time-lapse video
Front
40 MP (PDAF, HDR)
Video capture: 4K UHD (60 fps)
16 MP (HDR)
Video capture: 1080p

Connectivity & Features

Bluetooth
5.1 5.1
WLAN
802.11 a,b,g,n,ac,ax(Wi-Fi 6),dual-band
MIMO, Wi-Fi Direct, Hotspot
802.11 a,b,g,n,ac,dual-band
Wi-Fi Direct, Hotspot
USB
Type-C, USB 3.2 Type-C, USB 2.0
Hearing aid compatible
M3/T3
Location
GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning GPS, A-GPS, Glonass, Galileo, BeiDou, QZSS, Cell ID, Wi-Fi positioning
Sensors
Accelerometer, Gyroscope, Compass, Hall (for flip covers), Barometer Accelerometer, Gyroscope, Compass
Other
NFC, ANT+

Multimedia

Headphones
No 3.5mm jack 3.5mm jack
Speakers
Earpiece, Multiple speakers Earpiece, Loudspeaker
Features
32-Bit DAC, Dolby Atmos, aptX, Dolby Digital, Dolby Digital Plus
Screen mirroring
Wireless screen share Wireless screen share
Radio
FM, Stereo, RDS
Additional microphone(s)
Noise cancellation, Video recording Noise cancellation

Cellular

5G
Bands n2, n5, n12, n25, n41, n66, n71, n77, n260, n261, SA, NSA, Sub-6, mmWave Bands n1, n3, n5, n7, n8, n20, n28, n38, n40, n41, n77, n78, SA, NSA
4G (FDD)
Bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 30(2300 WCS), 66(AWS-3), 71(600) Bands 1, 2, 3, 5, 7, 8, 28
4G (TDD)
Bands 38, 39, 40, 41, 46, 48 Bands 34, 38, 39, 40, 41
3G
Bands 1, 2, 4, 5, 8 Bands 1, 2, 5, 6, 8, 19
Data Speed
LTE-A Pro Cat 20 (2000/150 Mbit/s) LTE-A, HSDPA+ (4G) 42.2 Mbit/s
Dual SIM
No
SIM type
Nano SIM Nano SIM

Regulatory Approval

FCC approval
Date approved: Dec 22, 2020
FCC ID value: A3LSMG998U
Date approved: Mar 30, 2021
FCC ID value: 2AUYFRMX3241
Measured SAR
Head: 0.77 W/kg
Body: 1.02 W/kg
Simultaneous Transmission: 1.59 W/kg
Wireless Router: 1.16 W/kg
Phablet: 3.15 W/kg
Head: 1.15 W/kg
Body: 0.43 W/kg
Simultaneous Transmission: 1.47 W/kg
Wireless Router: 0.90 W/kg

Buyers information

MSRP
$ 1200 / € 1399 € 200
In The Box
C to C Data Cable, Ejection Pin USB Type-C Cable, 9V2A Charge Adapter, SIM Card Needle, Screen Protect Film, Protect Case, Quick Start Guide, Important Product Information (including the Warranty Card)

Availability

Officially announced
Jan 14, 2021 Apr 21, 2021

Alternative variants

with 256GB storage
Memory 256GB
Colors Phantom black
MSRP $ 1250
With 8GB RAM
Memory 8GB
with 512GB storage
Memory 16GB/512GB
Colors Phantom black
MSRP $ 1380
for Europe
System chip Samsung Exynos 2100 (5 nm)
Processor Octa-core
1x 2.91GHz Cortex-X1 + 3x 2.81GHz Cortex-A78 + 4x 2.2GHz Cortex-A55
GPU Mali G78 MP14
Weight 8.01 oz (227.0 g)
5G Bands SA, NSA, Sub-6
FCC approval Date approved: Dec 22, 2020
FCC ID value: A3LSMG998B
Measured SAR Head: 0.16 W/kg
Body: 0.72 W/kg
Simultaneous Transmission: 1.59 W/kg
Wireless Router: 1.34 W/kg
Phablet: 3.86 W/kg
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