Samsung Galaxy A21s vs Xiaomi Redmi 9 Specs Comparison

Design

Dimensions
6.44 x 2.96 x 0.35 inches 163.7 x 75.3 x 8.9 mm	6.43 x 3.03 x 0.36 inches 163.32 x 77.01 x 9.1 mm
Weight
6.77 oz (192.0 g)	6.98 oz (198.0 g)
Biometrics
2D Face unlock, Fingerprint (touch)	2D Face unlock, Fingerprint (touch)
Keys
Right: Volume control, Lock/Unlock key	Right: Volume control, Lock/Unlock key
Colors
Black, White, Blue, Red	Carbon gray, Sunset purple, Ocean green

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 %	83.27 %
Features
Proximity sensor	Oleophobic coating, Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor

Hardware

System chip
Samsung Exynos 850	MediaTek Helio G80 (12 nm)
Processor
Octa-core 8x 2.0GHz Cortex-A55	Octa-core 2000 MHz Arm Cortex-A75 and Arm Cortex-A55
GPU
Mali-G76	Mali G52 MC2
RAM
3GB (LPDDR4)	3GB (LPDDR4)
Internal storage
32GB (eMMC 5.1), available to use: 19.5 GB	32GB (eMMC 5.1)
Storage expansion
microSDXC up to 512 GB	microSDXC
OS
Android (10), Samsung One UI	Android

Battery

Capacity
5000 mAh	5020 mAh
Type
Li - Polymer
Charging
Fast charging	Qualcomm Quick Charge 3.0
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

9h 15min

Gaming

7h 3min

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	13 MP (PDAF) Aperture size: F2.2
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
Third camera
2 MP (Macro) Aperture size: F2.4	5 MP (Macro) Aperture size: F2.4
Fourth camera
2 MP (Depth information) Aperture size: F2.4	2 MP (Depth information)
Flash
LED	LED
Video recording
1920x1080 (Full HD) (30 fps)	1920x1080 (Full HD)
Front
13 MP, Video capture: 1920x1080 (Full HD)	8 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 b,g,n 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, 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
Radio
	FM
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
HD Voice
	Yes
VoLTE
	Yes

Buyers information

MSRP
€ 240
In The Box
	10W Charger, TPU case, USB Type-C cable, SIM eject tool, Warranty card, User guide

Availability

Officially announced
May 15, 2020

Alternative variants

with 4GB RAM

RAM	4GB
Internal storage	64GB

with 64GB storage

RAM	4GB
Internal storage	64GB

with 6GB RAM

RAM	6GB
Internal storage	64GB

Links

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