Samsung Galaxy S9 vs Samsung Galaxy A20 vs Samsung Galaxy A21

Compare phone and tablet specifications of up to three devices at once.

Display

Size:

5.8 inches
6.4 inches
6.5 inches

Resolution:

2960 x 1440 pixels, 18.5:9 ratio, 568 PPI
1560 x 720 pixels, 19.5:9 ratio, 268 PPI
1600 x 720 pixels, 20:9 ratio, 270 PPI

Technology:

Super AMOLED
Super AMOLED
IPS LCD

Screen-to-body:

84.36 %
84.95 %
79.20 %

Features:

HDR support, Scratch-resistant glass (Corning Gorilla Glass 5), Ambient light sensor, Proximity sensor
Proximity sensor
60Hz refresh rate, Ambient light sensor, Proximity sensor

Hardware

System chip:

Qualcomm Snapdragon 845 SDM845
Samsung Exynos 7884
Mediatek Helio P35

Processor:

Octa-core, 2800 MHz, Kryo 385, 64-bit, 10 nm
Octa-core, 1800 MHz, ARM Cortex-A73 and ARM Cortex-A53, 64-bit, 14 nm
Octa-core, 2300 MHz, Arm Cortex-A53, 64-bit, 12 nm

GPU:

Adreno 630
Mali-G71 MP2
PowerVR GE8320

RAM:

4GB LPDDR4
3GB LPDDR4
3GB LPDDR4

Internal storage:

64GB
32GB, available to use: 20.3 GB
32GB (eMMC 5.1), available to use: 19.8 GB

Storage expansion:

microSDXC up to 400 GB
microSDXC up to 512 GB
microSDXC up to 512 GB

Device type:

Smartphone
Smartphone
Smartphone

OS:

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

Battery

Capacity:

3000 mAh
4000 mAh
4000 mAh

Type:

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

Charging:

Qualcomm Quick Charge 2.0, Samsung Adaptive Fast Charging, Qi and Powermat wireless charging
Samsung Adaptive Fast Charging
Fast charging

Max charge speed:

Wired: 15.0W

Camera

Rear:

Single camera
Dual camera
Quad camera

Main camera:

12 MP (OIS, PDAF)
13 MP (Autofocus)
16 MP (PDAF)

Specifications:

Aperture size: F1.5/F2.4; Sensor size: 1/2.55"; Pixel size: 1.4 μm
Aperture size: F1.9; Focal length: 27 mm; Sensor size: 1/3.1"; Pixel size: 1.12 μm
Aperture size: F1.8; Sensor size: 1/3.06"; Pixel size: 1 μm

Second camera:

5 MP (Ultra-wide)
8 MP (Ultra-wide)

Specifications:

Aperture size: F2.2; Focal Length: 13 mm; Sensor size: 1/5"; Pixel size: 1.12 μm
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:

3840x2160 (4K UHD) (60 fps), 1920x1080 (Full HD) (240 fps), 1280x720 (HD) (960 fps)
1920x1080 (Full HD) (30 fps)
1920x1080 (Full HD) (30 fps)

Features:

HDR, Time-lapse video, Hyperlapse, Continuous autofocus, Object tracking, Picture-taking during video recording, Video calling, Video sharing

Front:

8 MP (Autofocus, HDR)
8 MP
13 MP

Video capture:

2560x1440 (QHD) (30 fps)
1920x1080 (Full HD)

Design

Dimensions:

5.81 x 2.70 x 0.33 inches (147.7 x 68.7 x 8.5 mm)
6.24 x 2.94 x 0.31 inches (158.4 x 74.7 x 7.8 mm)
6.61 x 3.02 x 0.32 inches (167.8 x 76.7 x 8.1 mm)

Weight:

5.75 oz (163.0 g)
5.96 oz (169.0 g)
6.81 oz (193.0 g)

Materials:

Back: Glass (Corning Gorilla Glass 5); Frame: Aluminum
Back: Plastic
Back: Plastic; Frame: Plastic

Resistance:

Water, Dust; IP68

Biometrics:

Iris scanner, 2D Face unlock, Fingerprint (touch)
2D Face unlock, Fingerprint (touch)
Fingerprint (touch)

Features:

Notification light

Keys:

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

Colors:

Midnight black, Coral blue, Titanium gray, Lilac purple, Burgundy red, Sunrise gold, Ice blue
Black,Deep blue, Red
Black

Cellular

LTE (FDD):

Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 12(700 a), 13(700 c), 14(700 PS), 17(700 b), 18(800 Lower), 19(800 Upper), 20(800 DD), 25(1900+), 26(850+), 28(700 APT), 29(700 d), 30(2300 WCS), 66(AWS-3), 71(600)
Bands 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 13(700 c), 20(800 DD), 28(700 APT), 66(AWS-3)
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+), 46
Bands 38(2600), 39(1900+), 40(2300), 41(2600+)

UMTS:

Bands 5(850), 8(900), 4(1700/2100), 2(1900), 1(2100)
Bands 5(850), 8(900), 2(1900), 1(2100)
Bands 5(850), 8(900), 4(1700/2100), 2(1900), 1(2100)

Data Speed:

LTE-A Pro Cat 18 (1200/150 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA
LTE-A Cat 6 (300/50 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
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
Nano SIM

HD Voice:

Yes

Multimedia

Headphones:

3.5mm jack
3.5mm jack
3.5mm jack

Speakers:

Earpiece, Multiple speakers
Earpiece, Loudspeaker
Earpiece, Loudspeaker

Features:

32-Bit DAC, aptX-HD
Dolby Atmos

Screen mirroring:

Wireless screen share
Wireless screen share
Wireless screen share

Radio:

FM
FM

Additional microphone(s):

for Noise cancellation
for Noise cancellation

Connectivity & Features

Bluetooth:

5.0
5.0
5.0

Wi-Fi:

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

USB:

Type-C (reversible), USB 3.1
Type-C (reversible), USB 2.0
Type-C (reversible), USB 2.0

Features:

Charging, OTG, Video out
Charging
Charging

Location:

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

Sensors:

Accelerometer, Gyroscope, Compass, Hall (for flip covers), Barometer
Accelerometer, Gyroscope, Compass, Hall (for flip covers)
Accelerometer, Gyroscope, Compass

Other:

NFC, ANT+
NFC

Hearing aid compatible:

M4, T3

Regulatory Approval

FCC approval:

Date approved:

Jan 11, 2018
Jun 19, 2019
Apr 17, 2020

FCC ID value:

A3LSMG960U link
A3LSMA205U link
ZCASMA215U link

Measured SAR:

Head:

0.35 W/kg
1.09 W/kg
0.42 W/kg

Body:

0.96 W/kg
0.60 W/kg
1.27 W/kg

Simultaneous Transmission:

1.59 W/kg
1.37 W/kg
1.27 W/kg

Wireless Router:

0.95 W/kg
1.00 W/kg
1.27 W/kg

Phablet:

3.94 W/kg

Buyers information

Price:

$ 720
$ 250
$ 250

In The Box:

This is the official Samsu​ng Galaxy A21 User Guide in English provided from the manufacturer.

Availability

Officially announced:

Feb 25, 2018
Apr 08, 2020
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