Xiaomi Redmi Note 9 vs Samsung Galaxy A21s Specs Comparison

Design

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

Display

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

Hardware

System chip
MediaTek Helio G85 (12 nm)	Samsung Exynos 850
Processor
Octa-core 2000 MHz Arm Cortex-A75 and ArmCortex-A55	Octa-core 8x 2.0GHz Cortex-A55
GPU
Mali G52 MC2	Mali-G76
Memory
3GB (LPDDR4)/64GB (eMMC 5.1)	3GB (LPDDR4)/32GB (eMMC 5.1)
Storage expansion
microSDXC up to 128 GB	microSDXC up to 512 GB
OS
Android (10)	Android (10)

Battery

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

PhoneArena Battery Tests

Battery Life Estimate

Untested

Browsing

Untested

Video

10h 43min

Gaming

7h 34min

Battery Life Estimate

Untested

Browsing

Untested

Video

11h 9min

Gaming

7h 48min

Learn more on our PhoneArena Battery Test Results page

Camera

Rear
Quad camera	Quad camera
Main camera
48 MP (PDAF) Aperture size: F1.8 Sensor size: 1/2" Pixel size: 0.8 μm	48 MP (PDAF) Aperture size: F2.0 Focal length: 26 mm 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: 1.2 μm	8 MP (Ultra-wide) Aperture size: F2.2 Sensor size: 1/4" Pixel size: 1.12 μm
Third camera
2 MP (Macro, Autofocus) Aperture size: F2.4 Pixel size: 1.75 μm	2 MP (Macro) Aperture size: F2.4
Fourth camera
2 MP Aperture size: F2.4 Sensor size: 1/5" Pixel size: 1.7 μm	2 MP (Depth information) Aperture size: F2.4
Flash
LED	LED
Video recording
1080p (30 fps), 720p (120 fps)	1080p (30 fps)
Front
13 MP (HDR) Video capture: 1080p	13 MP Video capture: 1080p

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, Compass	Accelerometer, Gyroscope
Other
NFC, Infrared	NFC

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, 2, 3, 4, 5, 7, 8, 20, 28	Bands 1, 2, 3, 5, 7, 8, 20, 28
4G (TDD)
Bands 38, 40, 41	Bands 38, 40, 41
3G
Bands 1, 2, 4, 5, 8	Bands 1, 2, 5, 8
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
Apr 30, 2020	May 15, 2020

Alternative variants

with 128GB storage

Memory	4GB/128GB

with 4GB RAM

Memory	4GB/64GB

with 6GB RAM

Memory	6GB/64GB

Links

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