Samsung Galaxy M21 vs Xiaomi Redmi Note 9S
Compare phone and tablet specifications of up to three devices. Type a model name in the search field of our phone comparison tool or pick a popular device from the ones below.
Display
Size
Resolution
Technology
Super AMOLED
IPS LCD
Screen-to-body
84.11 %
84.42 %
Features
Scratch-resistant glass (Corning Gorilla Glass 3), Proximity sensor
HDR video support, Scratch-resistant glass (Corning Gorilla Glass 5), Ambient light sensor, Proximity sensor
Hardware & Performance
System chip
Exynos 9611
Qualcomm Snapdragon 720G SM7125
Processor
GPU
Mali-G72 MP3
Adreno 618
RAM
Internal storage
64GB
64GB
Storage expansion
microSDXC up to 512 GB
microSDXC up to 512 GB
OS
Android (10), Samsung One UI
Android (10)
Battery
Capacity
6000 mAh
5020 mAh
Type
Li - Polymer, Not user replaceable
Li - Polymer, Not user replaceable
Charging
Fast charging
Fast charging
Camera
Rear
Triple camera
Quad camera
Main camera
Specifications
Aperture size: F2.0; Focal length: 26 mm; Sensor size: 1/2"; Pixel size: 0.8 μm
Aperture size: F1.8; Sensor size: 1/2"; Pixel size: 0.8 μm
Second camera
8 MP (Ultra-wide)
8 MP (Ultra-wide)
Specifications
Aperture size: F2.2; Focal Length: 12 mm; Sensor size: 1/4"; Pixel size: 1.12 μm
Aperture size: F2.2; Pixel size: 1.12 μm
Third camera
5 MP (Depth information)
5 MP (Macro, Autofocus)
Specifications
Aperture size: F2.2
Aperture size: F2.4; Pixel size: 1.12 μm
Fourth camera
2 MP (Depth information)
Specifications
Aperture size: F2.4; Pixel size: 1.75 μm
Video recording
3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD), 1280x720 (HD) (240 fps)
3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD) (120 fps), 1280x720 (HD) (960 fps)
Features
EIS
Front
20 MP (HDR)
16 MP (HDR, Slow-motion videos)
Design
Dimensions
Weight
the average is 6.5 oz (184 g)
the average is 6.5 oz (184 g)
Materials
Back: Plastic; Frame: Plastic
Back: Glass (Corning Gorilla Glass 5)
Biometrics
2D Face unlock, Fingerprint (touch)
Fingerprint (touch)
Colors
Midnight blue, Raven black
Interstellar grey, Aurora blue, Glacier white
Cellular
LTE (FDD)
Bands 1(2100), 3(1800), 5(850), 7(2600), 8(900), 20(800 DD)
LTE (TDD)
Bands 38(2600), 40(2300), 41(2600+)
Bands 38(2600), 40(2300)
UMTS
850, 900, 1900, 2100 MHz
850, 900, 1700/2100, 1900, 2100 MHz
Data Speed
Dual SIM
Yes
Yes
SIM type
Nano SIM
Nano SIM
VoLTE
Yes
Multimedia
Headphones
3.5mm jack
3.5mm jack
Features
Dolby Atmos
Connectivity & Features
Bluetooth
5.0
5.0
Wi-Fi
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 (reversible), USB 2.0
Type-C (reversible)
Features
Charging
Charging
Sensors
Accelerometer, Gyroscope
Accelerometer, Gyroscope, Compass
Other
Infrared
Shopping information
In The Box
22.5W Wire charger, Simple protective cover, USB Type-C cable, SIM eject tool, User guide, Warranty card
MSRP
$ 249
