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Samsung Galaxy J3 (2018) vs Samsung Galaxy A21

Compare phone and tablet specifications of up to three devices. Type a model name in the search field of our phone specs comparison tool or pick a popular device from the ones below.

$178 VIEW ON amazon
$165 VIEW ON ebay

Display

Size

5.0 inches
6.5 inches

Resolution

1280 x 720 pixels, 16:9 ratio,
294 PPI
1600 x 720 pixels, 20:9 ratio,
270 PPI

Technology

TFT
IPS LCD

Screen-to-body

68.87 %
79.20 %

Colors

16 777 216
 

Touchscreen

Capacitive, Multi-touch
 

Features

Proximity sensor
Ambient light sensor, Proximity sensor

Hardware

System chip

Samsung Exynos 7 Quad 7570
Mediatek Helio P35

Processor

Quad-core, 1400 MHz, ARM Cortex-A53, 64-bit, 14 nm
Octa-core, 2300 MHz, Arm Cortex-A53, 64-bit, 12 nm

GPU

Mali-T720 MP1
PowerVR GE8320

RAM

2GB
3GB LPDDR4

Internal storage

16GB
32GB (eMMC 5.1), available to use: 19.8 GB

Storage expansion

microSDXC up to 400 GB
microSDXC up to 512 GB

Device type

Smartphone
Smartphone

OS

Android (9.0 Pie, 8.0 Oreo)
Android (10), Samsung One UI

Battery

Capacity

2600 mAh
4000 mAh

Type

User replaceable
Li - Polymer, Not user replaceable

Charging

 
Fast charging

Max charge speed

 
Wired: 15.0W

Camera

Rear

Single camera
Quad camera

Main camera

8 MP (Autofocus, BSI sensor)
16 MP (PDAF)

Specifications

Aperture size: F1.9; Focal length: 27 mm; Sensor size: 1/4"; Pixel size: 1.12 μm
Aperture size: F1.8; Sensor size: 1/3.06"; Pixel size: 1 μm

Second camera

 
8 MP (Ultra-wide)

Specifications

 
Aperture size: F2.2; Sensor size: 1/4"; Pixel size: 1.12 μm

Third camera

 
2 MP (Macro)

Specifications

 
Aperture size: F2.4

Fourth camera

 
2 MP (Depth information)

Specifications

 
Aperture size: F2.4

Video recording

1920x1080 (Full HD) (30 fps)
1920x1080 (Full HD) (30 fps)

Features

Video calling, Video sharing
 

Front

5 MP
13 MP

Design

Dimensions

5.62 x 2.76 x 0.35 inches (142.7 x 70.1 x 8.9 mm)
6.61 x 3.02 x 0.32 inches (167.8 x 76.7 x 8.1 mm)

Weight

5.36 oz (152.0 g)
the average is 6.3 oz (179 g)
6.81 oz (193.0 g)
the average is 6.3 oz (179 g)

Materials

Back: Plastic
Back: Plastic; Frame: Plastic

Biometrics

 
Fingerprint (touch)

Features

Touch sensitive control keys
 

Keys

Left: Volume control; Right: Lock/Unlock key
Right: Volume control, Lock/Unlock key

Colors

Silver
Black

Cellular

LTE (FDD)

Bands 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 12(700 a), 14(700 PS)
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)

LTE (TDD)

 
Bands 38(2600), 39(1900+), 40(2300), 41(2600+)

UMTS

850, 1900, 2100 MHz
850, 900, 1700/2100, 1900, 2100 MHz

Data Speed

LTE Cat 4 (150/50 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s, HSUPA, UMTS
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

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
FM

Connectivity & Features

Bluetooth

4.2
5.0

Wi-Fi

802.11 b, g, n; Hotspot, Wi-Fi Direct
802.11 a, b, g, n, ac, dual-band; Wi-Fi Direct, Hotspot

USB

microUSB, USB 2.0
Type-C (reversible), USB 2.0

Features

Mass storage device, Charging
Charging

Location

GPS, A-GPS, Glonass
GPS, A-GPS, Glonass, BeiDou, Cell ID, Wi-Fi positioning

Sensors

Accelerometer, Gyroscope, Compass
Accelerometer, Gyroscope, Compass

Other

UMA (Wi-Fi Calling), VoIP, Tethering, Computer sync, OTA sync
NFC

Hearing aid compatible

M3, T3
M4, T3

Phone features

Notifications

Haptic feedback, Music ringtones, Vibration, Flight mode, Silent mode, Speakerphone
 

Other features

Voice dialing, Voice commands, Voice recording, TTY/TDD
 

Regulatory Approval

FCC approval

 
 

Date approved

Apr 04, 2018
Apr 17, 2020

FCC ID value: A3LSMJ337A link
FCC ID value: ZCASMA215U link

Measured SAR

 
 

Head

1.22 W/kg
0.42 W/kg

Body

1.02 W/kg
1.27 W/kg

Simultaneous Transmission

1.56 W/kg
1.27 W/kg

Wireless Router

1.18 W/kg
1.27 W/kg

Buyers information

Price

 
$ 250

In The Box

Charger and microUSB cable
Download the Samsu​ng Galaxy A21 Manual as a PDF file.

Availability

Officially announced

Jun 07, 2018
Apr 08, 2020
This copy is for your personal, non-commercial use only. You can order presentation-ready copies for distribution to your colleagues, clients or customers at https://www.parsintl.com/phonearena or use the Reprints & Permissions tool that appears at the bottom of each web page. Visit https://www.parsintl.com/ for samples and additional information.
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