Samsung Galaxy J8 vs Samsung Galaxy A51 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.

	7.0
Samsung Galaxy J8	Samsung Galaxy A51
Released · Jun 28, 2018	Released · Dec 27, 2019
6.0-inch · 1480x720px	6.5-inch · 2400x1080px
Dual camera	Quad camera
4GB · 64GB	4GB · 128GB
3500 mAh	4000 mAh
	Check prices

Design

Dimensions
6.27 x 2.98 x 0.32 inches 159.2 x 75.7 x 8.2 mm	6.24 x 2.90 x 0.31 inches 158.5 x 73.6 x 7.9 mm
Weight
6.24 oz (177.0 g)	6.07 oz (172.0 g)
Materials
Back: Plastic	Back: Plastic Frame: Plastic
Biometrics
2D Face unlock, Fingerprint (touch)	2D Face unlock, Optical in-screen fingerprint
Keys
Left: Volume control; Right: Lock/Unlock key	Right: Volume control, Lock/Unlock key
Colors
Black, Gold, Pink, Blue	Prism Crush black, Prism Crush white, Prism Crush pink, Prism Crush blue

Display

Size
6.0-inch	6.5-inch
Resolution
1480x720px, 18.5:9 ratio, 274 PPI	2400x1080px, 20:9 ratio, 405 PPI
Technology
Super AMOLED	Super AMOLED
Refresh rate
	60Hz
Screen-to-body
75.79 %	87.37 %
Features
Proximity sensor	Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor

Hardware

System chip
Qualcomm Snapdragon 450 SDM450 (14 nm)	Samsung Exynos 9611 (10 nm)
Processor
Octa-core 1800 MHz ARM Cortex-A53	Octa-core 2300 MHz 4x 2.3GHz Cortex-A73 + 4x 1.7GHz Cortex-A53
GPU
Adreno 506	Mali-G72 MP3
Memory
4GB (LPDDR3)/64GB	4GB (LPDDR4)/128GB
Storage expansion
microSDXC up to 256 GB	microSDXC up to 512 GB
OS
Android (10, 8.0 Oreo)	Android (11, 10)

Battery

Type
3500 mAh	4000 mAh, Li - Polymer
Charging
	Fast charging

Battery Life Estimate

Untested

Browsing

Untested

Video

Untested

Gaming

Untested

Battery Life Estimate

5h 22min

Browsing

11h 35min

Video

8h 35min

Gaming

6h 40min

Camera

Rear
Dual camera	Quad camera
Main camera
16 MP (PDAF, CCD image sensor) Aperture size: F1.7 Focal length: 26 mm Sensor size: 1/2.8" Pixel size: 1.12 μm	48 MP (PDAF) Aperture size: F2.0 Focal length: 26 mm Sensor size: 1/2" Pixel size: 0.8 μm
Second camera
5 MP (Depth information) Aperture size: F1.9 Focal Length: 24 mm Sensor size: 1/5" Pixel size: 1.12 μm	12 MP (Ultra-wide) Aperture size: F2.2 Focal Length: 13 mm Pixel size: 1.12 μm
Third camera
	5 MP (Macro) Aperture size: F2.4 Focal Length: 40 mm
Fourth camera
	5 MP (Depth information) Aperture size: F2.2 Sensor size: 1/5" Pixel size: 1.12 μm
Flash
LED	LED
Video recording
1080p (30 fps) Video calling, Video sharing	4K UHD (30 fps), 1080p (120 fps), 720p (240 fps) Hyperlapse, EIS
Front
16 MP (Flash, HDR)	32 MP (HDR) Video capture: 1080p

Connectivity & Features

Bluetooth
4.2	5.0
WLAN
802.11 b,g,n Wi-Fi Direct, Hotspot	802.11 a,b,g,n,ac,dual-band Wi-Fi Direct, Hotspot
USB
microUSB, USB 2.0	Type-C, USB 2.0
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)
Other
ANT+, VoIP, Tethering, Computer sync, OTA sync	NFC, ANT+

Multimedia

Headphones
3.5mm jack	3.5mm jack
Speakers
Earpiece, Loudspeaker	Earpiece, Loudspeaker
Features
Dolby Atmos, Album art cover, Background playback	Dolby Atmos
Screen mirroring
Wireless screen share	Wireless screen share
Radio
FM	FM
Additional microphone(s)
	Noise cancellation

Cellular

4G (FDD)
Bands 1, 3, 5, 7, 8, 20	Bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 20, 25, 26, 28, 29(700 d), 30(2300 WCS), 66(AWS-3), 71(600)
4G (TDD)
Bands 38, 40, 41	Bands 38, 39, 41
3G
Bands 5, 8, 2, 1	Bands 1, 2, 4, 5, 8
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
Dual SIM
Yes
SIM type
Nano SIM	Nano SIM

Regulatory Approval

FCC approval
	Date approved: Nov 28, 2019 FCC ID value: A3LSMA515FN
Measured SAR
	Head: 0.89 W/kg Body: 1.18 W/kg Simultaneous Transmission: 1.56 W/kg Wireless Router: 1.12 W/kg Phablet: 2.76 W/kg

Buyers information

MSRP
	$ 400
In The Box
Charger, microUSB cable, Documentation, Quick Start Guide, Headphones and SIM removal tool.

Availability

Officially announced
Jun 27, 2018	Dec 12, 2019

Alternative variants

with 128GB storage


Memory	6GB/128GB

for Verizon


4G (FDD)	Bands 2, 3, 4, 5, 7, 13, 20, 28, 66(AWS-3)
3G	Bands 5, 8, 2, 1

for AT&T


4G (FDD)	Bands 2, 4, 5, 12, 13, 25, 26, 66(AWS-3), 71(600)
4G (TDD)	Bands 41

for Sprint


4G (FDD)	Bands 2, 4, 5, 12, 13, 25, 26, 66(AWS-3), 71(600)
4G (TDD)	Bands 41

for Europe


4G (FDD)	Bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 20, 26, 28, 66(AWS-3)
4G (TDD)	Bands 38, 40, 41
Dual SIM	Yes

Links

Full specifications
Samsung Galaxy J8 Specs	Samsung Galaxy A51 Specs
PhoneArena Review
	Samsung Galaxy A51 Review
User Reviews
	Samsung Galaxy A51 User Reviews