Samsung Galaxy J7 (2018) vs Samsung Galaxy A21 Specs Comparison

Design

Dimensions
6.03 x 3 x 0.34 inches 153.2 x 76.2 x 8.6 mm	6.61 x 3.02 x 0.32 inches 167.8 x 76.7 x 8.1 mm
Weight
6.38 oz (181.0 g)	6.81 oz (193.0 g)
Materials
Back: Plastic	Back: Plastic Frame: Plastic
Biometrics
2D Face unlock	Fingerprint (touch)
Features
Touch sensitive control keys
Keys
Left: Volume control; Right: Lock/Unlock key	Right: Volume control, Lock/Unlock key
Colors
Black	Black

Display

Size
5.5-inch	6.5-inch
Resolution
1280x720px, 16:9 ratio, 267 PPI	1600x720px, 20:9 ratio, 270 PPI
Technology
TFT	IPS LCD
Refresh rate
	60Hz
Screen-to-body
71.45 %	79.20 %
Features
Scratch-resistant glass (Corning Gorilla Glass 5), Ambient light sensor, Proximity sensor	Ambient light sensor, Proximity sensor

Hardware

System chip
Samsung Exynos 7 Octa 7870 (14 nm)	Mediatek Helio P35 MT6765 (12 nm)
Processor
Octa-core 1600 MHz ARM Cortex-A53	Octa-core 4x 2.3GHz Cortex-A53 + 4x 1.8GHz Cortex-A53
GPU
Mali-T830 MP1	PowerVR GE8320
Memory
2GB (LPDDR3)/32GB	3GB (LPDDR4)/32GB (eMMC 5.1)
Storage expansion
microSDXC up to 400 GB	microSDXC up to 512 GB
OS
Android (8.0 Oreo)	Android (10)

Battery

Type
3300 mAh	4000 mAh, Li - Polymer
Charging
	Fast charging
Charge speed
	Wired: 15.0W

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	16 MP (PDAF) Aperture size: F1.8 Sensor size: 1/3.06" Pixel size: 1 μm
Second camera
	8 MP (Ultra-wide) Aperture size: F2.2 Sensor size: 1/4" Pixel size: 1.12 μm
Third camera
	2 MP (Macro) Aperture size: F2.4
Fourth camera
	2 MP (Depth information) Aperture size: F2.4
Flash
LED	LED
Video recording
1080p (30 fps) Video calling, Video sharing	1080p (30 fps)
Front
13 MP	13 MP Video capture: 1080p

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	M4/T3
Location
GPS, A-GPS, Glonass	GPS, A-GPS, Glonass, BeiDou, Cell ID, Wi-Fi positioning
Sensors
Accelerometer, Gyroscope, Compass	Accelerometer, Gyroscope, Compass
Other
ANT+, UMA (Wi-Fi Calling), VoIP, Tethering, Computer sync, OTA sync	NFC

Multimedia

Headphones
3.5mm jack	3.5mm jack
Speakers
Earpiece, Loudspeaker	Earpiece, Loudspeaker
Features
Album art cover, Background playback
Screen mirroring
Wireless screen share	Wireless screen share
Radio
	FM

Cellular

4G (FDD)
Bands 2, 3, 4, 5, 7, 12, 14	Bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 20, 25, 26, 28, 66(AWS-3), 71(600)
4G (TDD)
	Bands 38, 39, 40, 41
3G
Bands 5, 2, 1	Bands 1, 2, 4, 5, 8
Data Speed
LTE, HSPA, HSUPA	LTE-A Cat 6 (300/50 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
SIM type
Nano SIM	Nano SIM
HD Voice
Yes	Yes

Regulatory Approval

FCC approval
Date approved: Apr 24, 2018 FCC ID value: A3LSMJ737A	Date approved: Apr 17, 2020 FCC ID value: ZCASMA215U
Measured SAR
Head: 1.03 W/kg Body: 0.76 W/kg Simultaneous Transmission: 1.58 W/kg Wireless Router: 0.98 W/kg Phablet: 3.58 W/kg	Head: 0.42 W/kg Body: 1.27 W/kg Simultaneous Transmission: 1.27 W/kg Wireless Router: 1.27 W/kg

Buyers information

MSRP
$ 230	$ 250
In The Box
microUSB cable, Wall Charger	This is the official Samsu​ng Galaxy A21 User Guide in English provided from the manufacturer.

Availability

Officially announced
Jun 07, 2018	Apr 08, 2020

Alternative variants

for TracFone Wireless

Memory	16GB

for Verizon

4G (FDD)	Bands 1, 2, 3, 5, 7, 8, 20, 28
4G (TDD)	Bands 38, 40, 41
3G	Bands 5, 8, 2, 1

for Sprint

4G (FDD)	Bands 2, 3, 4, 5, 7, 12, 13, 25, 26, 66(AWS-3), 71(600)
4G (TDD)	Bands 41

Links

Full specifications
Samsung Galaxy J7 (2018) Specs	Samsung Galaxy A21 Specs
PhoneArena Review
Samsung Galaxy J7 (2018) Review
User Reviews
	Samsung Galaxy A21 User Reviews