Samsung Galaxy A21s vs Xiaomi Redmi Note 9 Specs Comparison

Design

Dimensions
6.44 x 2.96 x 0.35 inches 163.7 x 75.3 x 8.9 mm	6.39 x 3.04 x 0.35 inches 162.3 x 77.2 x 8.9 mm
Weight
6.77 oz (192.0 g)	7.02 oz (199.0 g)
Materials
	Frame: Plastic
Resistance
	Splash
Biometrics
2D Face unlock, Fingerprint (touch)	Fingerprint (touch)
Keys
Right: Volume control, Lock/Unlock key	Right: Volume control, Lock/Unlock key
Colors
Black, White, Blue, Red	Forest green, Polar white, Midnight gray

Display

Size
6.5-inch	6.5-inch
Resolution
1600x720px, 20:9 ratio, 270 PPI	2340x1080px, 19.5:9 ratio, 395 PPI
Technology
TFT	IPS LCD
Screen-to-body
82.94 %	83.52 %
Features
Proximity sensor	Scratch-resistant glass (Corning Gorilla Glass 5), Ambient light sensor, Proximity sensor

Hardware

System chip
Samsung Exynos 850	MediaTek Helio G85 (12 nm)
Processor
Octa-core 8x 2.0GHz Cortex-A55	Octa-core 2000 MHz Arm Cortex-A75 and ArmCortex-A55
GPU
Mali-G76	Mali G52 MC2
RAM
3GB (LPDDR4)	3GB (LPDDR4)
Internal storage
32GB (eMMC 5.1), available to use: 19.5 GB	64GB (eMMC 5.1)
Storage expansion
microSDXC up to 512 GB	microSDXC up to 128 GB
OS
Android (10), Samsung One UI	Android (10), Xiaomi MI UI

Battery

Capacity
5000 mAh	5020 mAh
Type
Li - Polymer	Li - Polymer
Charging
Fast charging	Fast charging, Reverse wired charging
Charge speed
	Wired: 18.0W

PhoneArena Battery Tests

Battery Life Estimate

Untested

Browsing

Untested

Video

11h 9min

Gaming

7h 48min

Battery Life Estimate

Untested

Browsing

Untested

Video

10h 43min

Gaming

7h 34min

Learn more on our PhoneArena Battery Test Results page

Camera

Rear
Quad camera	Quad camera
Main camera
48 MP (PDAF) Aperture size: F2.0 Focal length: 26 mm Sensor size: 1/2" Pixel size: 0.8 μm	48 MP (PDAF) Aperture size: F1.8 Sensor size: 1/2" Pixel size: 0.8 μm
Second camera
8 MP (Ultra-wide) Aperture size: F2.2 Sensor size: 1/4" Pixel size: 1.12 μm	8 MP (Ultra-wide) Aperture size: F2.2 Sensor size: 1/4" Pixel size: 1.2 μm
Third camera
2 MP (Macro) Aperture size: F2.4	2 MP (Macro, Autofocus) Aperture size: F2.4 Pixel size: 1.75 μm
Fourth camera
2 MP (Depth information) Aperture size: F2.4	2 MP Aperture size: F2.4 Sensor size: 1/5" Pixel size: 1.7 μm
Flash
LED	LED
Video recording
1920x1080 (Full HD) (30 fps)	1920x1080 (Full HD) (30 fps), 1280x720 (HD) (120 fps)
Front
13 MP, Video capture: 1920x1080 (Full HD)	13 MP (HDR), Video capture: 1920x1080 (Full HD)

Connectivity & Features

Bluetooth
5.0	5.0
WLAN
802.11 a,b,g,n,ac,dual-band Wi-Fi Direct, Hotspot	802.11 a,b,g,n,ac,dual-band Wi-Fi Direct, Hotspot
USB
Type-C, USB 2.0	Type-C, USB 2.0
Location
GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning	GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
Sensors
Accelerometer, Gyroscope	Accelerometer, Gyroscope, Compass
Other
NFC	NFC, Infrared

Multimedia

Headphones
3.5mm jack	3.5mm jack
Speakers
Earpiece, Loudspeaker	Earpiece, Loudspeaker
Screen mirroring
Wireless screen share	Wireless screen share
Additional microphone(s)
	Noise cancellation

Cellular

4G (FDD)
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), 20(800 DD), 28(700 APT)
4G (TDD)
Bands 38(2600), 40(2300), 41(2600+)	Bands 38(2600), 40(2300), 41(2600+)
3G
Bands 1(2100), 2(1900), 5(850), 8(900)	Bands 1(2100), 2(1900), 4(1700/2100), 5(850), 8(900)
Data Speed
LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s	LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
Dual SIM
Yes	Yes
SIM type
Nano SIM	Nano SIM
VoLTE
	Yes

Buyers information

MSRP
€ 240
In The Box
	22.5W Charger, Simple protective cover, USB Type-C cable, SIM eject tool, User guide, Warranty card

Availability

Officially announced
May 15, 2020	Apr 30, 2020

Alternative variants

with 4GB RAM

RAM	4GB
Internal storage	64GB

with 128GB storage

RAM	4GB
Internal storage	128GB

with 6GB RAM

RAM	6GB
Internal storage	64GB

Links

Full specifications
Samsung Galaxy A21s Specs	Xiaomi Redmi Note 9 Specs
PhoneArena Review
Samsung Galaxy A21s Review	Xiaomi Redmi Note 9 Review
User Reviews
	Xiaomi Redmi Note 9 User Reviews