Samsung Galaxy A21 vs Xiaomi Redmi Note 9 - specs comparison

Display

Size:

6.5 inches

Resolution:

1600 x 720 pixels, 20:9 ratio, 270 PPI

2340 x 1080 pixels, 19.5:9 ratio, 395 PPI

Technology:

IPS LCD

Screen-to-body:

79.20 %

83.52 %

Features:

60Hz refresh rate, Ambient light sensor, Proximity sensor

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

Hardware

System chip:

Mediatek Helio P35

MediaTek Helio G85

Processor:

Octa-core, 2300 MHz, Arm Cortex-A53, 64-bit, 12 nm

Octa-core, 2000 MHz, Arm Cortex-A75 and ArmCortex-A55, 64-bit, 12 nm

GPU:

PowerVR GE8320

Mali G52 MC2

RAM:

3GB LPDDR4

Internal storage:

32GB (eMMC 5.1), available to use: 19.8 GB

64GB (eMMC 5.1)

Storage expansion:

microSDXC up to 512 GB

microSDXC up to 128 GB

Device type:

Smartphone

OS:

Android (10), Samsung One UI

Android (10), Xiaomi MI UI

Battery

Capacity:

4000 mAh

5020 mAh

Type:

Li - Polymer, Not user replaceable

Battery life test results:

link

Charging:

Fast charging

Fast charging, Reverse charging

Max charge speed:

Wired: 15.0W

Wired: 18.0W

Camera

Rear:

Quad camera

Main camera:

16 MP (PDAF)

48 MP (PDAF)

Specifications:

F1.8; 1/3.06"; 1 μm

F1.8; 1/2"; 0.8 μm

Second camera:

8 MP (Ultra-wide)

Specifications:

Aperture size: F2.2; Sensor size: 1/4"; Pixel size: 1.12 μm

Aperture size: F2.2; Sensor size: 1/4"; Pixel size: 1.2 μm

Third camera:

2 MP (Macro)

2 MP (Macro, Autofocus)

Specifications:

Aperture size: F2.4

Aperture size: F2.4; Pixel size: 1.75 μm

Fourth camera:

2 MP (Depth information)

2 MP

Specifications:

Aperture size: F2.4

Aperture size: F2.4; Sensor size: 1/5"; Pixel size: 1.7 μm

Video recording:

1920x1080 (Full HD) (30 fps)

1920x1080 (Full HD) (30 fps), 1280x720 (HD) (120 fps)

Front:

13 MP

13 MP (HDR)

Video capture:

1920x1080 (Full HD)

Design

Dimensions:

6.61 x 3.02 x 0.32 inches (167.8 x 76.7 x 8.1 mm)

6.39 x 3.04 x 0.35 inches (162.3 x 77.2 x 8.9 mm)

Weight:

6.81 oz (193.0 g)

7.02 oz (199.0 g)

Materials:

Back: Plastic; Frame: Plastic

Frame: Plastic

Resistance:

Splash

Biometrics:

Fingerprint (touch)

Keys:

Right: Volume control, Lock/Unlock key

Colors:

Black

Forest green, Polar white, Midnight gray

Cellular

LTE (FDD):

Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 12(700 a), 13(700 c), 17(700 b), 20(800 DD), 25(1900+), 26(850+), 28(700 APT), 66(AWS-3), 71(600)

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

LTE (TDD):

Bands 38(2600), 39(1900+), 40(2300), 41(2600+)

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

UMTS:

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

Data Speed:

LTE-A Cat 6 (300/50 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

SIM type:

Nano SIM

HD Voice:

Yes

VoLTE:

Yes

Multimedia

Headphones:

3.5mm jack

Speakers:

Earpiece, Loudspeaker

Screen mirroring:

Wireless screen share

Radio:

FM

Additional microphone(s):

for Noise cancellation

Connectivity & Features

Bluetooth:

5.0

Wi-Fi:

802.11 a, b, g, n, ac, dual-band; Wi-Fi Direct, Hotspot

USB:

Type-C (reversible), USB 2.0

Features:

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

Other:

NFC

NFC, Infrared

Hearing aid compatible:

M4, T3

Regulatory Approval

FCC approval:

Date approved:

Apr 17, 2020

FCC ID value:

ZCASMA215U link

Measured SAR:

Head:

0.42 W/kg

Body:

1.27 W/kg

Simultaneous Transmission:

1.27 W/kg

Wireless Router:

1.27 W/kg

Buyers information

Price:

$ 250

In The Box:

This is the official Samsung Galaxy A21 User Guide in English provided from the manufacturer.

22.5W Charger, Simple protective cover, USB Type-C cable, SIM eject tool, User guide, Warranty card

Availability

Officially announced:

Apr 08, 2020

Apr 30, 2020