Samsung Galaxy J7 vs Samsung Galaxy A21 Specs Comparison

Design

Dimensions
6.00 x 3.09 x 0.30 inches 152.4 x 78.6 x 7.5 mm	6.61 x 3.02 x 0.32 inches 167.8 x 76.7 x 8.1 mm
Weight
6.03 oz (171.0 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, Gold, White	Black

Display

Size
5.5-inch	6.5-inch
Resolution
1280x720px, 267 PPI	1600x720px, 20:9 ratio, 270 PPI
Technology
Super AMOLED	IPS LCD
Refresh rate
	60Hz
Screen-to-body
69.72 %	79.20 %
Colors
16 777 216
Features
Ambient light sensor, Proximity sensor	Ambient light sensor, Proximity sensor

Hardware

System chip
Qualcomm Snapdragon 615 8939	Mediatek Helio P35 MT6765 (12 nm)
Processor
Octa-core 1500 MHz ARM Cortex-A53	Octa-core 4x 2.3GHz Cortex-A53 + 4x 1.8GHz Cortex-A53
GPU
Adreno 405	PowerVR GE8320
RAM
1.5GB (LPDDR3)	3GB (LPDDR4)
Internal storage
16GB, available to use: 11.6 GB	32GB (eMMC 5.1), available to use: 19.8 GB
Storage expansion
microSDXC up to 128 GB	microSDXC up to 512 GB
OS
Android (6.0 Marshmallow, 5.1 Lollipop)	Android (10), Samsung One UI

Battery

Capacity
3000 mAh	4000 mAh
Type
	Li - Polymer
Charging
	Fast charging
Charge speed
	Wired: 15.0W

Camera

Rear
Single camera	Quad camera
Main camera
13 MP (Autofocus) Aperture size: F1.9 Focal length: 28 mm	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	1920x1080 (Full HD) (30 fps)
Front
5 MP (Flash)	13 MP, Video capture: 1920x1080 (Full HD)

Connectivity & Features

Bluetooth
4.1	5.0
WLAN
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, 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, Hall (for flip covers)	Accelerometer, Gyroscope, Compass
Other
ANT+	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, RDS	FM

Cellular

4G (FDD)
Bands 1(2100), 3(1800), 5(850), 7(2600), 8(900), 20(800 DD)	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 40(2300)	Bands 38(2600), 39(1900+), 40(2300), 41(2600+)
3G
Bands 5(850), 8(900), 2(1900), 1(2100)	Bands 1(2100), 2(1900), 4(1700/2100), 5(850), 8(900)
Data Speed
LTE, HSPA	LTE-A Cat 6 (300/50 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
Dual SIM
Yes
SIM type
Micro SIM	Nano SIM
HD Voice
	Yes

Phone Features

Notifications
Haptic feedback, Music ringtones (MP3), Polyphonic ringtones, Vibration, Flight mode, Silent mode, Speakerphone
Other features
Voice dialing, Voice commands, Voice recording

Regulatory Approval

FCC approval
	Date approved: Apr 17, 2020 FCC ID value: ZCASMA215U
Measured SAR
	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
$ 234	$ 250
In The Box
	This is the official Samsu​ng Galaxy A21 User Guide in English provided from the manufacturer.

Availability

Officially announced
Jul 16, 2015	Apr 08, 2020

Alternative variants

RAM	2GB
4G (FDD)	Bands 12(700 a), 5(850), 26(850+), 4(AWS-1), 2(1900), 25(1900+)
4G (TDD)	Bands 41(2600+)
3G	Bands 5(850), 8(900), 4(1700/2100), 2(1900), 1(2100)

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)

RAM	2GB
OS	Android (7.1 Nougat)
4G (FDD)	Bands 2(1900), 4(AWS-1), 5(850), 12(700 a)
3G	Bands 5(850), 4(1700/2100), 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 Specs	Samsung Galaxy A21 Specs
User Reviews
Samsung Galaxy J7 User Reviews	Samsung Galaxy A21 User Reviews