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Samsung Galaxy J7 Perx vs Samsung Galaxy A21 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.


Samsung Galaxy J7 Perx	Samsung Galaxy A21
Released · Apr 10, 2017	Released · Jun 29, 2020
5.5-inch · 1280x720px	6.5-inch · 1600x720px
Single camera	Quad camera
2GB · 16GB	3GB · 32GB
3300 mAh	4000 mAh

Design

Dimensions
5.9 x 3 x 0.3 inches 149.9 x 76.2 x 7.6 mm	6.61 x 3.02 x 0.32 inches 167.8 x 76.7 x 8.1 mm
Weight
5.90 oz (167.3 g)	6.81 oz (193.0 g)
Materials
	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
Black	Black

Display

Size
5.5-inch	6.5-inch
Resolution
1280x720px, 267 PPI	1600x720px, 20:9 ratio, 270 PPI
Technology
TFT	IPS LCD
Refresh rate
	60Hz
Screen-to-body
73.03 %	79.20 %
Colors
16 777 216
Features
Proximity sensor	Ambient light sensor, Proximity sensor

Hardware

System chip
Qualcomm Snapdragon 625 8953 (14 nm)	Mediatek Helio P35 MT6765 (12 nm)
Processor
Octa-core 2200 MHz ARM Cortex-A53	Octa-core 4x 2.3GHz Cortex-A53 + 4x 1.8GHz Cortex-A53
GPU
Adreno 506	PowerVR GE8320
RAM
2GB (LPDDR3)	3GB (LPDDR4)
Internal storage
16GB	32GB (eMMC 5.1), available to use: 19.8 GB
Storage expansion
microSDXC up to 128 GB	microSDXC up to 512 GB
OS
Android (7.0 Nougat)	Android (10), Samsung One UI

Battery

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

Camera

Rear
Single camera	Quad camera
Main camera
8 MP (Autofocus, CMOS image sensor)	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
1920x1080 (Full HD) (30 fps) Video calling, Video sharing	1920x1080 (Full HD) (30 fps)
Front
5 MP, Video capture: 1920x1080 (Full HD)	13 MP, Video capture: 1920x1080 (Full HD)

Connectivity & Features

Bluetooth
4.2	5.0
WLAN
802.11 a,b,g,n,ac,dual-band Hotspot, Wi-Fi Direct	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
	M4/T3
Location
GPS, A-GPS, Glonass	GPS, A-GPS, Glonass, BeiDou, Cell ID, Wi-Fi positioning
Sensors
Accelerometer, Gyroscope, Compass, Hall (for flip covers), Barometer	Accelerometer, Gyroscope, Compass
Other
ANT+, 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	FM

Cellular

4G (FDD)
Bands 2(1900), 4(AWS-1), 5(850), 12(700 a), 25(1900+), 26(850+)	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 41(2600+)	Bands 38(2600), 39(1900+), 40(2300), 41(2600+)
3G
Bands 5(850), 8(900), 4(1700/2100), 2(1900), 1(2100)	Bands 1(2100), 2(1900), 4(1700/2100), 5(850), 8(900)
Data Speed
LTE, HSPA, UMTS	LTE-A Cat 6 (300/50 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
SIM type
	Nano SIM
HD Voice
Yes	Yes

Phone Features

Notifications
Haptic feedback
Other features
Voice dialing, Voice commands, Voice recording

Regulatory Approval

FCC approval
Date approved: Aug 01, 2017 FCC ID value: A3LSMJ727P	Date approved: Apr 17, 2020 FCC ID value: ZCASMA215U
Measured SAR
Head: 0.65 W/kg Body: 0.17 W/kg Simultaneous Transmission: 1.59 W/kg Wireless Router: 0.59 W/kg Phablet: 3.99 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
	$ 250
In The Box
	This is the official Samsung Galaxy A21 User Guide in English provided from the manufacturer.

Availability

Officially announced
Apr 10, 2017	Apr 08, 2020

Alternative variants

for Verizon


4G (FDD)	Bands 1(2100), 2(1900), 3(1800), 5(850), 7(2600), 8(900), 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)

for Sprint


4G (FDD)	Bands 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 12(700 a), 13(700 c), 25(1900+), 26(850+), 66(AWS-3), 71(600)
4G (TDD)	Bands 41(2600+)

Links

Full specifications
Samsung Galaxy J7 Perx Specs	Samsung Galaxy A21 Specs
User Reviews
	Samsung Galaxy A21 User Reviews