Xiaomi Mi A3 vs Samsung Galaxy M21

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Display

Size

6.1 inches
6.4 inches

Resolution

1560 x 720 pixels, 19.5:9 ratio,
282 PPI
2340 x 1080 pixels, 19.5:9 ratio,
403 PPI

Technology

Super AMOLED
Super AMOLED

Screen-to-body

82.56 %
84.11 %

Peak brightness

 
420 cd/m2 (nit)

Features

Scratch-resistant glass (Corning Gorilla Glass 5), Ambient light sensor, Proximity sensor
Scratch-resistant glass (Corning Gorilla Glass 3), Proximity sensor

Hardware

System chip

Qualcomm Snapdragon 665
Exynos 9611

Processor

Octa-core, 2000 MHz, Kryo 260, 64-bit, 11 nm
Octa-core, 2300 MHz, Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm

GPU

Adreno 610
Mali-G72 MP3

RAM

4GB LPDDR4
4GB LPDDR4

Internal storage

128GB
64GB, available to use: 49 GB

Storage expansion

microSDXC up to 256 GB
microSDXC up to 512 GB

OS

Android (10, 9.0 Pie)
Android (10), Samsung One UI

Battery

Capacity

4030 mAh
6000 mAh

Type

Not user replaceable
Li - Polymer, Not user replaceable

Charging

Qualcomm Quick Charge 3.0
Fast charging

Camera

Rear

Triple camera
Triple camera

Main camera

48 MP (PDAF)
48 MP (PDAF)

Specifications

Aperture size: F1.8; Sensor size: 1/2.3"; Pixel size: 0.8 μm
Aperture size: F2.0; Focal length: 26 mm; Sensor size: 1/2"; Pixel size: 0.8 μm

Second camera

8 MP (Ultra-wide)
8 MP (Ultra-wide)

Specifications

Aperture size: F2.2; Pixel size: 1.12 μm
Aperture size: F2.2; Focal Length: 12 mm; Sensor size: 1/4"; Pixel size: 1.12 μm

Third camera

2 MP (Depth information)
5 MP (Depth information)

Specifications

Aperture size: F2.4
Aperture size: F2.2

Video recording

3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD) (120 fps), 1280x720 (HD) (240 fps)
3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD), 1280x720 (HD) (240 fps)

Features

EIS, Video calling, Video sharing
EIS

Front

32 MP
20 MP (HDR)

Design

Dimensions

6.04 x 2.83 x 0.33 inches (153.48 x 71.85 x 8.475 mm)
6.26 x 2.96 x 0.35 inches (159.0 x 75.1 x 8.9 mm)

Weight

6.13 oz (173.8 g)
the average is 6.2 oz (178 g)
6.63 oz (188.0 g)
the average is 6.2 oz (178 g)

Materials

Back: Glass (Corning Gorilla Glass 5); Frame: Aluminum
Back: Plastic; Frame: Plastic

Biometrics

2D Face unlock, In-screen fingerprint
2D Face unlock, Fingerprint (touch)

Colors

Gray, Blue, White
Midnight blue, Raven black

Cellular

LTE (FDD)

Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 20(800 DD), 28(700 APT)
Bands 1(2100), 3(1800), 5(850), 7(2600), 8(900), 20(800 DD)

LTE (TDD)

Bands 38(2600), 40(2300)
Bands 38(2600), 40(2300), 41(2600+)

UMTS

850, 900, 1700/2100, 1900, 2100 MHz
850, 900, 1900, 2100 MHz

Data Speed

LTE-A Cat 9 (450/50 Mbit/s), 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

Multimedia

Headphones

3.5mm jack
3.5mm jack

Speakers

Earpiece, Loudspeaker
Earpiece, Loudspeaker

Features

Album art cover, Background playback
Dolby Atmos

Screen mirroring

Wireless screen share
Wireless screen share

Radio

FM
FM

Additional microphone(s)

for Noise cancellation
 

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)
Type-C (reversible), USB 2.0

Features

Charging, Mass storage device
Charging

Location

GPS, A-GPS, Glonass, BeiDou, Cell ID, Wi-Fi positioning
GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning

Sensors

Accelerometer, Gyroscope, Compass
Accelerometer, Gyroscope

Other

Infrared, VoIP, Tethering, Computer sync, OTA sync
 

Buyers information

In The Box

10W charger, USB Type-C cable, SIM eject tool, User guide, Soft case, Warranty card
 
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