Samsung Galaxy Note9 vs Samsung Galaxy A21s vs Samsung Galaxy Note 20 Ultra

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

Comparison mode:

Display

Size:

6.4 inches
6.5 inches
6.9 inches

Resolution:

2960 x 1440 pixels, 18.5:9 ratio, 516 PPI
1600 x 720 pixels, 20:9 ratio, 270 PPI
3088 x 1440 pixels, 19.3:9 ratio, 496 PPI

Technology:

Super AMOLED
TFT
Dynamic AMOLED

Screen-to-body:

83.51 %
82.94 %
91.63 %

Features:

HDR support, Scratch-resistant glass (Corning Gorilla Glass 5), Ambient light sensor, Proximity sensor
Proximity sensor
120Hz refresh rate, HDR support, Scratch-resistant glass (Corning Gorilla Glass Victus), Ambient light sensor, Proximity sensor

Hardware

System chip:

Qualcomm Snapdragon 845 SDM845
Samsung Exynos 850
Qualcomm Snapdragon 865+ SM8250-AB

Processor:

Octa-core, 2800 MHz, Kryo 385, 64-bit, 10 nm
Octa-core, 2000 MHz, Arm Cortex-A55, 64-bit
Octa-core, 3000 MHz, Kryo 585, 64-bit, 7 nm

GPU:

Adreno 630
Mali-G76
Adreno 650

RAM:

6GB LPDDR4
3GB LPDDR4
12GB LPDDR5

Internal storage:

128GB
32GB (eMMC 5.1), available to use: 19.5 GB
128GB, available to use: 107 GB

Storage expansion:

microSDXC up to 512 GB
microSDXC up to 512 GB
microSDXC up to 1000 GB

Device type:

Smartphone
Smartphone
Smartphone

OS:

Android (10, 9.0 Pie, 8.1 Oreo), Samsung One UI
Android (10), Samsung One UI
Android (11, 10), Samsung One UI

Battery

Capacity:

4000 mAh
5000 mAh
4500 mAh

Type:

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

Battery life test results:

Charging:

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

Camera

Rear:

Dual camera
Quad camera
Triple camera

Main camera:

12 MP (OIS, PDAF)
48 MP (PDAF)
108 MP (OIS, Laser and PDAF)

Specifications:

Aperture size: F1.5/F2.4; Focal length: 26 mm; Sensor size: 1/2.55"; Pixel size: 1.4 μm
Aperture size: F2.0; Focal length: 26 mm; Sensor size: 1/2"; Pixel size: 0.8 μm
Aperture size: F1.8; Focal length: 26 mm; Sensor size: 1/1.33"; Pixel size: 0.8 μm

Second camera:

12 MP (Telephoto, OIS, Autofocus)
8 MP (Ultra-wide)
12 MP (Telephoto, OIS, PDAF)

Specifications:

Optical zoom: 2.0x; Aperture size: F2.4; Focal Length: 52 mm; Sensor size: 1/3.4"; Pixel size: 1 μm
Aperture size: F2.2; Sensor size: 1/4"; Pixel size: 1.12 μm
Optical zoom: 5.0x; Aperture size: F3.0; Focal Length: 120 mm; Pixel size: 1 μm

Third camera:

2 MP (Macro)
12 MP (Ultra-wide, Autofocus)

Specifications:

Aperture size: F2.4
Aperture size: F2.2; Focal Length: 13 mm; Sensor size: 1/2.55"; Pixel size: 1.4 μm

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)
7680x4320 (8K UHD) (24 fps), 3840x2160 (4K UHD) (60 fps), 1920x1080 (Full HD) (240 fps), 1280x720 (HD) (960 fps)

Features:

Time-lapse video, Hyperlapse, Continuous autofocus, Object tracking, EIS
OIS, HDR, Time-lapse video, Hyperlapse, Object tracking, EIS

Front:

8 MP (Wide Angle, Autofocus)
13 MP
10 MP (PDAF, HDR)

Video capture:

2560x1440 (QHD) (30 fps)
1920x1080 (Full HD)
3840x2160 (4K UHD)

Design

Dimensions:

6.37 x 3.01 x 0.35 inches (161.9 x 76.4 x 8.8 mm)
6.44 x 2.96 x 0.35 inches (163.7 x 75.3 x 8.9 mm)
6.49 x 3.04 x 0.32 inches (164.8 x 77.2 x 8.1 mm)

Weight:

7.09 oz (201.0 g)
6.77 oz (192.0 g)
7.34 oz (208.0 g)

Materials:

Back: Glass (Corning Gorilla Glass 5); Frame: Aluminum
Back: Glass (Corning Gorilla Glass Victus); Frame: Stainless steel

Resistance:

Water, Dust; IP68
Water, Dust; IP68

Biometrics:

Iris scanner, 2D Face unlock, Fingerprint (touch)
2D Face unlock, Fingerprint (touch)
2D Face unlock, Ultrasonic in-screen fingerprint

Features:

Notification light, Stylus
Stylus

Keys:

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

Colors:

Midnight black, Ocean blue, Cloud silver, Lavender purple
Black, White, Blue, Red
Mystic black, Mystic bronze, Mystic white

Cellular

5G:

n2, n5, n41, n66, n71, n260, n261, SA, NSA, Sub-6, mmWave

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

LTE (TDD):

Bands 38(2600), 39(1900+), 40(2300), 41(2600+), 46
Bands 38(2600), 40(2300), 41(2600+)
Bands 38(2600), 39(1900+), 40(2300), 41(2600+), 46, 48(3600)

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, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
LTE-A Pro Cat 20 (2000/150 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s

Dual SIM:

Yes

SIM type:

Nano SIM
Nano SIM
Nano SIM

HD Voice:

Yes
Yes

VoLTE:

Yes

Multimedia

Headphones:

3.5mm jack
3.5mm jack
No 3.5mm jack

Speakers:

Earpiece, Multiple speakers
Earpiece, Loudspeaker
Earpiece, Multiple speakers

Features:

32-Bit DAC, Dolby Atmos
32-Bit DAC, Dolby Atmos, aptX, Dolby Digital, Dolby Digital Plus

Screen mirroring:

Wireless screen share
Wireless screen share
Wireless screen share

Radio:

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, dual-band; Wi-Fi Direct, Hotspot
802.11 a, b, g, n, ac, ax (Wi-Fi 6), dual-band; MIMO, Wi-Fi Direct, Hotspot

USB:

Type-C (reversible), USB 3.1
Type-C (reversible), USB 2.0
Type-C (reversible), USB 3.2

Features:

Charging, OTG, Video out
Charging
Charging, Headphones port, OTG, Video out

Location:

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

Sensors:

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

Other:

NFC, ANT+
NFC
NFC, ANT+

Hearing aid compatible:

M4, T3
M3, T3

Regulatory Approval

FCC approval:

Date approved:

Jul 03, 2018
Jul 06, 2020

FCC ID value:

A3LSMN960U
A3LSMN986U

Measured SAR:

Head:

0.27 W/kg
0.78 W/kg

Body:

0.76 W/kg
1.04 W/kg

Simultaneous Transmission:

1.59 W/kg
1.59 W/kg

Wireless Router:

1.35 W/kg
1.18 W/kg

Phablet:

3.90 W/kg
3.92 W/kg

Buyers information

Price:

$ 1000
€ 240
$ 1300

User Manual:

This is the official Samsu​ng Galaxy A21s User Guide in English provided from the manufacturer.
This is the official Samsu​ng Galaxy Note 20 Ultra User Guide in English provided from the manufacturer.

In The Box:

S Pen, USB Cable, Earphones, SIM removal tool, USB power adaptor, USB connector, Pen, nibs, Tweezer, Clear cover case, Quick start guide, USB connector leaflet.
Data Cable, Travel Adapter, Ejection Pin, Quick Start Guide

Availability

Officially announced:

Aug 09, 2018
May 15, 2020
Aug 05, 2020
FCC OKs Cingular\'s purchase of AT&T Wireless