Samsung Galaxy A21s vs Xiaomi Redmi Note 9 Specs Comparison

Availability

Officially announced
May 15, 2020	Apr 30, 2020
Prices (MSRP)
€240

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, 82.94% screen-to-body	6.5-inch, 83.52% screen-to-body
Type
TFT	IPS LCD
Resolution
1600x720px, 20:9 ratio, 270 PPI	2340x1080px, 19.5:9 ratio, 395 PPI
Protection
	Corning Gorilla Glass 5

PhoneArena Display Test

Bright Max (20% APL)
Untested	Untested
Bright Min
4.6 (Poor)	0.8 (Excellent)

Learn more on our PhoneArena Display Test Results page.

Hardware

System chip
Samsung Exynos 850	MediaTek Helio G85 (12 nm)
Processor
Octa-core 8x2.0GHz Cortex-A55	Octa-core 2000 MHz Arm Cortex-A75 and ArmCortex-A55
GPU
Mali-G76	Mali G52 MC2
Memory
3GB (LPDDR4)/32GB (eMMC 5.1) 4GB/64GB 6GB/64GB	3GB (LPDDR4)/64GB (eMMC 5.1) 4GB/128GB
Storage expansion
microSDXC up to 512 GB	microSDXC up to 128 GB
OS
Android (10)	Android (10)

Battery

Type
5000 mAh, Li - Polymer	5020 mAh, 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
1080p (30 fps)	1080p (30 fps), 720p (120 fps)
Front
13 MP Video capture: 1080p	13 MP (HDR) Video capture: 1080p

Connectivity & Features

Bluetooth
5.0	5.0
WLAN
a,b,g,n,ac,dual-band Wi-Fi Direct, Hotspot 802.11 a, b, g, n, ac	a,b,g,n,ac,dual-band Wi-Fi Direct, Hotspot 802.11 a, b, g, n, ac
USB
Type-C, USB 2.0	Type-C, USB 2.0
Sensors
Accelerometer, Gyroscope, Proximity sensor	Accelerometer, Gyroscope, Compass, Ambient light sensor, Proximity sensor
Location
GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning	GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
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, 2, 3, 5, 7, 8, 20, 28	1, 2, 3, 4, 5, 7, 8, 20, 28
4G (TDD) Bands
38, 40, 41	38, 40, 41
3G Bands
1, 2, 5, 8	1, 2, 4, 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

Alternative variants

with 4GB RAM

Memory	4GB/64GB

with 128GB storage

Memory	4GB/128GB

with 6GB RAM

Memory	6GB/64GB

Discover more

Full Specs Samsung Galaxy A21s Specs PA Review Samsung Galaxy A21s Review

Full Specs Xiaomi Redmi Note 9 Specs PA Review Xiaomi Redmi Note 9 Review