Samsung Galaxy J7 Duo vs Samsung Galaxy A21s Specs Comparison

Availability

Officially announced
	May 15, 2020
Prices (MSRP)
	€240

Design

Dimensions
6.04 x 3.04 x 0.32 inches 153.5 x 77.2 x 8.2 mm	6.44 x 2.96 x 0.35 inches 163.7 x 75.3 x 8.9 mm
Weight
6.14 oz / 174.0 g	6.77 oz / 192.0 g
Materials
Back: Plastic
Biometrics
2D Face unlock, Fingerprint (touch)	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, Gold	Black, White, Blue, Red

Display

Size
5.5-inch, 70.40% screen-to-body	6.5-inch, 82.94% screen-to-body
Type
Super AMOLED	TFT
Resolution
1280x720px, 16:9 ratio, 267 PPI	1600x720px, 20:9 ratio, 270 PPI
Colors
16 777 216
Protection
Corning Gorilla Glass

PhoneArena Display Test

Bright Max (20% APL)
Untested	Untested
Bright Min
Untested	4.6 (Poor)

Learn more on our PhoneArena Display Test Results page.

Hardware

System chip
Samsung Exynos 7 Octa 7884 (14 nm)	Samsung Exynos 850
Processor
Octa-core 1600 MHz ARM Cortex-A53	Octa-core 8x2.0GHz Cortex-A55
GPU
ARM Mali-G71	Mali-G76
Memory
4GB/32GB	3GB (LPDDR4)/32GB (eMMC 5.1) 4GB/64GB 6GB/64GB
Storage expansion
microSDXC up to 256 GB	microSDXC up to 512 GB
OS
Android (8.0 Oreo)	Android (10)

Battery

Type
3000 mAh	5000 mAh, Li - Polymer
Charging
	Fast charging

PhoneArena Battery Tests

Battery Life Estimate

Untested

Browsing

Untested

Video

Untested

Gaming

Untested

Battery Life Estimate

Untested

Browsing

Untested

Video

11h 9min

Gaming

7h 48min

Learn more on our PhoneArena Battery Test Results page

Camera

Rear
Dual camera	Quad camera
Main camera
13 MP (PDAF) Aperture size: F1.9 Focal length: 27 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
5 MP (Depth information) Aperture size: F1.9 Focal Length: 24 mm Sensor size: 1/5" Pixel size: 1.12 μm	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
8 MP (Flash) Video capture: 1080p	13 MP Video capture: 1080p

Connectivity & Features

Bluetooth
5.0	5.0
WLAN
a,b,g,n,ac,dual-band Hotspot, Wi-Fi Direct 802.11 a, b, g, n, ac	a,b,g,n,ac,dual-band Wi-Fi Direct, Hotspot 802.11 a, b, g, n, ac
USB
microUSB, USB 2.0	Type-C, USB 2.0
Sensors
Accelerometer, Ambient light sensor, Proximity sensor	Accelerometer, Gyroscope, Proximity sensor
Location
GPS, A-GPS, Glonass, BeiDou	GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
Other
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
1, 3, 5, 7, 8, 20	1, 2, 3, 5, 7, 8, 20, 28
4G (TDD) Bands
38, 40, 41	38, 40, 41
3G Bands
5, 8, 2, 1	1, 2, 5, 8
Data Speed
LTE, HSPA, HSUPA, UMTS	LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
Dual SIM
Yes	Yes
SIM type
Micro SIM	Nano SIM

Phone Features

Notifications
Haptic feedback, Music ringtones, Vibration
Other features
Voice dialing, Voice commands, Voice recording

Regulatory Approval

Measured SAR
Head: 0.48 W/kg

Alternative variants

with 4GB RAM

Memory	4GB/64GB

with 6GB RAM

Memory	6GB/64GB

Discover more

Full Specs Samsung Galaxy J7 Duo Specs

Full Specs Samsung Galaxy A21s Specs PA Review Samsung Galaxy A21s Review