Samsung Galaxy J7 Star vs Samsung Galaxy A51 5G Specs Comparison

Design

Dimensions
6.03 x 3 x 0.34 inches 153.2 x 76.2 x 8.6 mm	6.26 x 2.90 x 0.34 inches 158.9 x 73.6 x 8.7 mm
Weight
6.38 oz (181.0 g)	6.60 oz (187.0 g)
Materials
	Back: Plastic Frame: Aluminum
Biometrics
2D Face unlock	2D Face unlock, Optical in-screen fingerprint
Features
Touch sensitive control keys
Keys
Left: Volume control; Right: Lock/Unlock key	Right: Volume control, Lock/Unlock key
Colors
Blue	Prism cube black

Display

Size
5.5-inch	6.5-inch
Resolution
1280x720px, 16:9 ratio, 267 PPI	2400x1080px, 20:9 ratio, 405 PPI
Technology
TFT	Super AMOLED
Refresh rate
	60Hz
Screen-to-body
71.45 %	87.37 %
Features
Scratch-resistant glass (Corning Gorilla Glass 5), Ambient light sensor, Proximity sensor	Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor

Hardware

System chip
Samsung Exynos 7 Octa 7870 (14 nm)	Samsung Exynos 980 (8 nm)
Processor
Octa-core 1600 MHz ARM Cortex-A53	Octa-core 2x 2.2GHz Cortex-A77 + 6x 1.8GHz Cortex-A55
GPU
Mali-T830 MP1	Mali-G76 MP5
RAM
2GB (LPDDR3)	6GB (LPDDR4)
Internal storage
32GB	128GB, available to use: 105.3 GB
Storage expansion
microSDXC up to 400 GB	microSDXC up to 1000 GB
OS
Android (9.0 Pie, 8.0 Oreo), Samsung One UI	Android (11, 10), Samsung One UI

Battery

Capacity
3300 mAh	4500 mAh
Type
Li - Polymer	Li - Polymer
Charging
	Fast charging
Charge speed
	Wired: 25.0W

Camera

Rear
Single camera	Quad camera
Main camera
13 MP (PDAF) Aperture size: F1.7 Focal length: 28 mm Sensor size: 1/3.06" 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
	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
1920x1080 (Full HD) (30 fps)	3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD) (120 fps), 1280x720 (HD) (480 fps) Hyperlapse, EIS
Front
13 MP	32 MP (HDR), Video capture: 1920x1080 (Full HD)

Connectivity & Features

Bluetooth
4.2	5.0
WLAN
802.11 a,b,g,n,ac,dual-band 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
Hearing aid compatible
M3/T3	M3/T3
Location
GPS, A-GPS, Glonass, Cell ID, Wi-Fi positioning	GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
Sensors
Accelerometer, Gyroscope, Compass	Accelerometer, Gyroscope, Compass, Hall (for flip covers)
Other
NFC, ANT+, UMA (Wi-Fi Calling)	NFC, ANT+

Multimedia

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

Cellular

5G
	Bands n41, n71, SA, NSA
4G (FDD)
Bands 2(1900), 4(AWS-1), 5(850), 12(700 a), 66(AWS-3), 71(600)	Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 12(700 a), 13(700 c), 17(700 b), 20(800 DD), 25(1900+), 26(850+), 28(700 APT), 66(AWS-3), 71(600)
4G (TDD)
	Bands 38(2600), 39(1900+), 40(2300), 41(2600+)
3G
Bands 5(850), 4(1700/2100), 2(1900), 1(2100)	Bands 1(2100), 2(1900), 4(1700/2100), 5(850)
Data Speed
LTE Cat 4 (150/50 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s	LTE-A Pro Cat 16 (1000/150 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
SIM type
Nano SIM
HD Voice
Yes	Yes

Regulatory Approval

FCC approval
Date approved: May 10, 2018 FCC ID value: A3LSMJ737T	Date approved: Jul 15, 2020 FCC ID value: A3LSMA516U
Measured SAR
Head: 1.36 W/kg Body: 1.01 W/kg Simultaneous Transmission: 1.58 W/kg Wireless Router: 1.11 W/kg Phablet: 3.60 W/kg	Head: 1.18 W/kg Body: 1.20 W/kg Simultaneous Transmission: 3.25 W/kg Wireless Router: 1.37 W/kg

Buyers information

MSRP
	$ 500
In The Box
USB cable, Wall charging adapter, Start guide, Terms & Conditions	A to C USB Cable, Wall Adapter, SIM Pin/Ejector, Quick Start Guide, Terms & Conditions

Availability

Officially announced
	Apr 08, 2020

Alternative variants

with 8GB RAM

RAM	8GB

for Europe

Colors	Prism cube black, Prism cube white
5G	Bands n41, n78, SA, NSA
4G (FDD)	Bands 1(2100), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 12(700 a), 20(800 DD), 28(700 APT)
4G (TDD)	Bands 38(2600), 40(2300), 41(2600+)
3G	Bands 5(850), 8(900), 2(1900), 1(2100)
Dual SIM	Yes
SIM type	Nano SIM

for Verizon

System chip	Qualcomm Snapdragon 765G SM7250-AB (7 nm)
Processor	Octa-core 2400 MHz Kryo 475
GPU	Adreno 620
Colors	Prism bricks blue
5G	Bands n260, n261, mmWave
4G (FDD)	Bands 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 12(700 a), 13(700 c), 20(800 DD), 28(700 APT), 66(AWS-3)
3G	Bands 5(850), 8(900), 2(1900), 1(2100)
FCC approval	Date approved: Jul 20, 2020 FCC ID value: A3LSMA516V
Measured SAR	Head: 0.32 W/kg Body: 1.32 W/kg Simultaneous Transmission: 3.01 W/kg Wireless Router: 1.37 W/kg Phablet: 3.91 W/kg
MSRP	$ 550

Links

Full specifications
Samsung Galaxy J7 Star Specs	Samsung Galaxy A51 5G Specs
User Reviews
	Samsung Galaxy A51 5G User Reviews