Samsung Galaxy J7 (2016) vs Samsung Galaxy A21s

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Display

Size

5.5 inches
6.5 inches

Resolution

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

Technology

Super AMOLED
TFT

Screen-to-body

72.41 %
82.94 %

Features

Proximity sensor
Proximity sensor

Hardware

System chip

Samsung Exynos 7 Octa 7870
Samsung Exynos 850

Processor

Octa-core, 1600 MHz, ARM Cortex-A53, 64-bit, 14 nm
Octa-core, 2000 MHz, Arm Cortex-A55, 64-bit

GPU

Mali-T830 MP2
Mali-G76

RAM

2GB LPDDR3
3GB LPDDR4

Internal storage

16GB, available to use: 10.8 GB
32GB (eMMC 5.1), available to use: 19.5 GB

Storage expansion

microSDXC up to 128 GB
microSDXC up to 512 GB

OS

Android (7.0 Nougat, 6.0 Marshmallow)
Android (10), Samsung One UI

Battery

Capacity

3300 mAh
5000 mAh

Type

Li - Ion, User replaceable
Li - Polymer, Not user replaceable

Charging

 
Fast charging

Camera

Rear

Single camera
Quad camera

Main camera

13 MP (Autofocus, CMOS image sensor)
48 MP (PDAF)

Specifications

Aperture size: F1.9; Focal length: 28 mm
Aperture size: F2.0; Focal length: 26 mm; Sensor size: 1/2"; Pixel size: 0.8 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
 

Front

5 MP (Flash)
13 MP

Design

Dimensions

5.97 x 2.99 x 0.31 inches (151.7 x 76 x 7.8 mm)
6.44 x 2.96 x 0.35 inches (163.7 x 75.3 x 8.9 mm)

Weight

5.96 oz (169.0 g)
the average is 6.2 oz (176 g)
6.77 oz (192.0 g)
the average is 6.2 oz (176 g)

Biometrics

 
2D Face unlock, Fingerprint (touch)

Features

Touch sensitive control keys
 

Colors

Gold, Pink, White, Rose gold
Black, White, Blue, Red

Cellular

LTE (FDD)

Bands 1(2100), 3(1800), 5(850), 7(2600), 8(900), 20(800 DD)
Bands 1(2100), 2(1900), 3(1800), 5(850), 7(2600), 8(900), 20(800 DD), 28(700 APT)

LTE (TDD)

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

UMTS

850, 900, 1900, 2100 MHz
850, 900, 1900, 2100 MHz

Data Speed

LTE-A Cat 6 (300/50 Mbit/s), HSPA
LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s

Dual SIM

 
Yes

SIM type

Micro SIM
Nano SIM

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
 

Connectivity & Features

Bluetooth

4.1
5.0

Wi-Fi

802.11 b, g, n; Wi-Fi Direct, Hotspot
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

Charging, Mass storage device
Charging

Location

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

Sensors

Accelerometer
Accelerometer, Gyroscope

Other

NFC, ANT+, Tethering, Computer sync, OTA sync
NFC

Regulatory Approval

Measured SAR

 
 

Head

0.35 W/kg
 

Body

1.39 W/kg
 
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