Xiaomi Mi A1 vs Xiaomi Redmi Note 9S Specs Comparison

Design

Dimensions
6.12 x 2.98 x 0.29 inches 155.4 x 75.8 x 7.3 mm	6.53 x 3.02 x 0.35 inches 165.75 x 76.68 x 8.8 mm
Weight
5.82 oz (165.0 g)	7.37 oz (209.0 g)
Materials
Back: Metal	Back: Glass (Corning Gorilla Glass 5)
Biometrics
Fingerprint (touch)	Fingerprint (touch)
Features
Touch sensitive control keys
Keys
Right: Volume control, Lock/Unlock key	Right: Volume control, Lock/Unlock key
Colors
Black, Gold, Pink	Interstellar grey, Aurora blue, Glacier white

Display

Size
5.5-inch	6.7-inch
Resolution
1920x1080px, 401 PPI	2400x1080px, 20:9 ratio, 395 PPI
Technology
IPS LCD	IPS LCD
Screen-to-body
70.87 %	84.42 %
Peak brightness
450 cd/m2 (nit)
Features
Oleophobic coating, Ambient light sensor, Proximity sensor	HDR support, Scratch-resistant glass (Corning Gorilla Glass 5), Ambient light sensor, Proximity sensor

Hardware

System chip
Qualcomm Snapdragon 625 8953 (14 nm)	Qualcomm Snapdragon 720G SM7125 (8 nm)
Processor
Octa-core 2000 MHz ARM Cortex-A53	Octa-core 2300 MHz Kryo 465
GPU
Adreno 506	Adreno 618
RAM
4GB (LPDDR3)	4GB (LPDDR4)
Internal storage
64GB	64GB
Storage expansion
microSDXC up to 256 GB	microSDXC up to 512 GB
OS
Android (9.0 Pie, 8.1 Oreo, 8.0 Oreo, 7.1 Nougat)	Android (11, 10)

Battery

Capacity
3080 mAh	5020 mAh
Type
Li - Ion	Li - Polymer
Charging
Fast charging	Fast charging

Camera

Rear
Dual camera	Quad camera
Main camera
12 MP (PDAF) Aperture size: F2.2 Focal length: 26 mm Pixel size: 1.25 μm	48 MP (PDAF) Aperture size: F1.8 Sensor size: 1/2" Pixel size: 0.8 μm
Second camera
12 MP (Telephoto, Autofocus) Optical zoom: 2.0x Aperture size: F2.6 Focal Length: 50 mm Pixel size: 1 μm	8 MP (Ultra-wide) Aperture size: F2.2 Pixel size: 1.12 μm
Third camera
	5 MP (Macro, Autofocus) Aperture size: F2.4 Pixel size: 1.12 μm
Fourth camera
	2 MP (Depth information) Aperture size: F2.4 Pixel size: 1.75 μm
Flash
Dual LED	Dual LED
Video recording
3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD) (30 fps), 1280x720 (HD) (120 fps) Video calling, Video sharing	3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD) (120 fps), 1280x720 (HD) (960 fps)
Front
5 MP, Video capture: 1920x1080 (Full HD)	16 MP (HDR, Slow-motion videos), Video capture: 1920x1080 (Full HD)

Connectivity & Features

Bluetooth
4.2	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	Type-C
Location
GPS, A-GPS, Glonass, BeiDou	GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
Sensors
Accelerometer, Gyroscope, Hall (for flip covers)	Accelerometer, Gyroscope, Compass
Other
Infrared, VoIP, Tethering, Computer sync, OTA sync	Infrared

Multimedia

Headphones
3.5mm jack	3.5mm jack
Speakers
Earpiece, Loudspeaker	Earpiece, Loudspeaker
Features
Album art cover, Background playback
Screen mirroring
Wireless screen share	Wireless screen share
Radio
FM
Additional microphone(s)
Noise cancellation	Noise cancellation

Cellular

4G (FDD)
Bands 1(2100), 3(1800), 5(850)
4G (TDD)
Bands 40(2300), 41(2600+)	Bands 38(2600), 40(2300)
3G
Bands 5(850), 8(900), 2(1900), 1(2100)	Bands 5(850), 8(900), 4(1700/2100), 2(1900), 1(2100)
Data Speed
LTE, HSPA, HSUPA	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
	$ 249
In The Box
	22.5W Wire charger, Simple protective cover, USB Type-C cable, SIM eject tool, User guide, Warranty card

Availability

Officially announced
Sep 05, 2017	Mar 23, 2020

Alternative variants

with 128GB storage

RAM	6GB
Internal storage	128GB
MSRP	$ 279

Links

Full specifications
Xiaomi Mi A1 Specs	Xiaomi Redmi Note 9S Specs
User Reviews
Xiaomi Mi A1 User Reviews