Samsung Galaxy J8 vs Samsung Galaxy S21 Specs Comparison

Display

Size
6.0-inch	6.2-inch
Resolution
1480 x 720 px, 18.5:9 ratio, 274 PPI	2400 x 1080 px, 20:9 ratio, 424 PPI
Technology
Super AMOLED	Dynamic AMOLED
Refresh rate
	120Hz (adaptive)
Screen-to-body
75.79 %	86.06 %
Peak brightness
	1300 cd/m2 (nit)
Features
Proximity sensor	HDR support, Scratch-resistant glass (Corning Gorilla Glass Victus), Ambient light sensor, Proximity sensor

Hardware

System chip
Qualcomm Snapdragon 450 SDM450 (14 nm)	Qualcomm Snapdragon 888 (5 nm)
Processor
Octa-core, 1800 MHz, ARM Cortex-A53, 64-bit	Octa-core, 1x 2.84GHz Kryo 680 + 3x 2.42GHz Kryo 680 + 4x 1.80GHz Kryo 680, 64-bit
GPU
Adreno 506	Adreno 660
RAM
4GB (LPDDR3)	8GB (LPDDR5)
Internal storage
64GB, available to use: 51 GB	128GB (UFS 3.0), not expandable
Storage expansion
microSDXC up to 256 GB
OS
Android (10, 8.0 Oreo), Samsung TouchWiz UI	Android (13, 12, 11), Samsung One UI
Device type
Smartphone	Smartphone

Battery

Capacity
3500 mAh	4000 mAh
Type
Not user replaceable	Li - Polymer, Not user replaceable
Charging
	Qualcomm Quick Charge 2.0, USB Power Delivery, Samsung Adaptive Fast Charging, Qi and Powermat wireless charging, Reverse wireless charging
Max charge speed
	Wired: 25.0W Wireless: 15.0W

PhoneArena Battery Tests

Battery Life Estimate

Untested

Browsing

Untested

Video

Untested

Gaming

Untested

Battery Life Estimate

4h 28min

Browsing

7h 47min

Video

7h 36min

Gaming

7h 9min

Find out more details about battery and charging for all phones we have tested on our PhoneArena Battery Score page.

Camera

Rear
Dual camera	Triple camera
Main camera
16 MP (PDAF, CCD image sensor) Specifications: Aperture size: F1.7 Focal length: 26 mm Sensor size: 1/2.8" Pixel size: 1.12 μm	12 MP (OIS, PDAF) Specifications: Aperture size: F1.8 Focal length: 26 mm Sensor size: 1/1.76" Pixel size: 1.8 μm
Second camera
5 MP (Depth information) Specifications: Aperture size: F1.9 Focal Length: 24 mm Sensor size: 1/5" Pixel size: 1.12 μm	64 MP (Telephoto, OIS, PDAF) Specifications: Aperture size: F2.0 Focal Length: 29 mm Sensor size: 1/1.7" Pixel size: 0.8 μm
Third camera
	12 MP (Ultra-wide, Autofocus) Specifications: Aperture size: F2.2 Focal Length: 13 mm Sensor size: 1/2.55" Pixel size: 1.4 μm
Flash
LED	LED
Video recording
1920x1080 (Full HD) (30 fps) Features: Video calling, Video sharing	7680x4320 (8K UHD) (24 fps), 3840x2160 (4K UHD) (60 fps), 1920x1080 (Full HD) (240 fps), 1280x720 (HD) (960 fps) Features: OIS, HDR, Hyperlapse, Continuous autofocus, Video light, EIS
Front
16 MP (Flash, HDR)	10 MP (PDAF, HDR), Video capture: 3840x2160 (4K UHD) (60 fps)

Design

Dimensions
6.27 x 2.98 x 0.32 inches (159.2 x 75.7 x 8.2 mm)	5.97 x 2.80 x 0.31 inches (151.7 x 71.2 x 7.9 mm)
Weight
6.24 oz(177.0 g)	6.03 oz(171.0 g)
Materials
Back: Plastic	Back: Plastic Frame: Aluminum
Resistance
	Water, Dust; IP68
Biometrics
2D Face unlock, Fingerprint (touch)	2D Face unlock, Ultrasonic in-screen fingerprint
Keys
Left: Volume control; Right: Lock/Unlock key	Right: Volume control, Lock/Unlock key
Colors
Black, Gold, Pink, Blue	Phantom pink, Violet, Gray, White

Cellular

5G
	Bands n2, n5, n12, n25, n41, n66, n71, n77, n260, n261, SA, NSA, Sub-6, mmWave
4G (FDD)
Bands 1(2100), 3(1800), 5(850), 7(2600), 8(900), 20(800 DD)	Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 12(700 a), 13(700 c), 14(700 PS), 18(800 Lower), 19(800 Upper), 20(800 DD), 25(1900+), 26(850+), 28(700 APT), 30(2300 WCS), 66(AWS-3), 71(600)
4G (TDD)
Bands 38(2600), 40(2300), 41(2600+)	Bands 38(2600), 39(1900+), 40(2300), 41(2600+), 46, 48(3600)
3G
Bands 5(850), 8(900), 2(1900), 1(2100)	Bands 1(2100), 2(1900), 4(1700/2100), 5(850), 8(900)
Data Speed
LTE-A Cat 6 (300/50 Mbit/s), HSPA, HSUPA	LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s, UMTS
Dual SIM
Yes
SIM type
Nano SIM	Nano SIM

Multimedia

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

Connectivity & Features

Bluetooth
4.2	5.0
Wi-Fi
802.11 b,g,n Wi-Fi Direct, Hotspot	802.11 a,b,g,n,ac,ax(Wi-Fi 6),dual-band MIMO, Wi-Fi Direct, Hotspot
USB
microUSB, USB 2.0, Features: Charging, Mass storage device	Type-C (reversible), USB 3.2, Features: Charging, Headphones port, OTG, Video out
Hearing aid compatible
	M3/T3
Location
GPS, A-GPS, Glonass, BeiDou	GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
Sensors
Accelerometer, Hall (for flip covers)	Accelerometer, Gyroscope, Compass, Hall (for flip covers), Barometer
Other
ANT+, VoIP, Tethering, Computer sync, OTA sync	NFC, ANT+

Regulatory Approval

FCC approval
	Date approved: Dec 08, 2020 FCC ID value: A3LSMG991U
Measured SAR
	Head: 0.36 W/kg Body: 1.08 W/kg Simultaneous Transmission: 3.96 W/kg Wireless Router: 1.09 W/kg Phablet: 2.49 W/kg

Buyers information

MSRP
	$ 800
In The Box
Charger, microUSB cable, Documentation, Quick Start Guide, Headphones and SIM removal tool.	C to C Data Cable, Ejection Pin

Availability

Officially announced
Jun 27, 2018	Jan 14, 2021

Alternative variants

with 256GB storage

Internal storage	256GB

for Europe

System chip	Samsung Exynos 2100 (5 nm)
Processor	Octa-core, 2900 MHz, 1x 2.91GHz Cortex-X1 + 3x 2.81GHz Cortex-A78 + 4x 2.2GHz Cortex-A55, 64-bit
GPU	Mali G78 MP14
Weight	5.96 oz(169.0 g)
5G	Bands SA, NSA, Sub-6
FCC approval	Date approved: Dec 18, 2020 FCC ID value: A3LSMG991B
Measured SAR	Head: 0.42 W/kg Body: 0.94 W/kg Simultaneous Transmission: 3.96 W/kg Wireless Router: 1.34 W/kg Phablet: 2.37 W/kg

Links

Full specifications
Samsung Galaxy J8 Specs	Samsung Galaxy S21 Specs
PhoneArena Review
	Samsung Galaxy S21 Review
User Reviews
	Samsung Galaxy S21 User Reviews