Xiaomi Redmi Note 9S vs realme 7 vs Samsung Galaxy A21s - specs comparison

Display

Size:

6.7 inches

6.5 inches

Resolution:

2400 x 1080 pixels, 20:9 ratio, 395 PPI

2400 x 1080 pixels, 20:9 ratio, 405 PPI

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

Technology:

IPS LCD

TFT

Screen-to-body:

84.42 %

83.31 %

82.94 %

Features:

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

90Hz refresh rate, Scratch-resistant glass (Corning Gorilla Glass), Ambient light sensor, Proximity sensor

Proximity sensor

Hardware

System chip:

Qualcomm Snapdragon 720G SM7125

MediaTek Helio G95

Samsung Exynos 850

Processor:

Octa-core, 2300 MHz, Kryo 465, 64-bit, 8 nm

Octa-core, 2050 MHz, Arm Cortex-A76 and Arm Cortex-A55, 64-bit, 12 nm

Octa-core, 2000 MHz, Arm Cortex-A55, 64-bit

GPU:

Adreno 618

Mali G76 MC4

Mali-G76

RAM:

4GB LPDDR4

3GB LPDDR4

Internal storage:

64GB

64GB (UFS 2.1)

32GB (eMMC 5.1), available to use: 19.5 GB

Storage expansion:

microSDXC up to 512 GB

microSDXC

microSDXC up to 512 GB

Device type:

Smartphone

OS:

Android (11, 10)

Android (10)

Android (10), Samsung One UI

Battery

Capacity:

5020 mAh

5000 mAh

Type:

Li - Polymer, Not user replaceable

Battery life test results:

link

Charging:

Fast charging

Max charge speed:

Wired: 30.0W

Camera

Rear:

Quad camera

Main camera:

48 MP (PDAF)

Specifications:

F1.8; 1/2"; 0.8 μm

F1.8; 26 mm; 1/2"; 0.8 μm

F2.0; 26 mm; 1/2"; 0.8 μm

Second camera:

8 MP (Ultra-wide)

Specifications:

Aperture size: F2.2; Pixel size: 1.12 μm

Aperture size: F2.3; Focal Length: 16 mm; Sensor size: 1/4"; Pixel size: 1.12 μm

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

Third camera:

5 MP (Macro, Autofocus)

2 MP (Macro)

Specifications:

Aperture size: F2.4; Pixel size: 1.12 μm

Aperture size: F2.4

Fourth camera:

2 MP (Depth information)

2 MP (Black and White)

2 MP (Depth information)

Specifications:

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

Aperture size: F2.4

Video recording:

3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD) (120 fps), 1280x720 (HD) (960 fps)

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

1920x1080 (Full HD) (30 fps)

Features:

EIS

Front:

16 MP (HDR, Slow-motion videos)

16 MP (Slow-motion videos)

13 MP

Video capture:

1920x1080 (Full HD)

Design

Dimensions:

6.53 x 3.02 x 0.35 inches (165.75 x 76.68 x 8.8 mm)

6.39 x 2.97 x 0.37 inches (162.3 x 75.4 x 9.4 mm)

6.44 x 2.96 x 0.35 inches (163.7 x 75.3 x 8.9 mm)

Weight:

7.37 oz (209.0 g)

6.93 oz (196.5 g)

6.77 oz (192.0 g)

Materials:

Back: Glass (Corning Gorilla Glass 5)

Back: Plastic; Frame: Plastic

Biometrics:

Fingerprint (touch)

2D Face unlock, Fingerprint (touch)

Keys:

Right: Volume control, Lock/Unlock key

Left: Volume control; Right: Lock/Unlock key

Right: Volume control, Lock/Unlock key

Colors:

Interstellar grey, Aurora blue, Glacier white

Mist blue, Mist white

Black, White, Blue, Red

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), 2(1900), 3(1800), 5(850), 7(2600), 8(900), 20(800 DD), 28(700 APT)

LTE (TDD):

Bands 38(2600), 40(2300)

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

UMTS:

Bands 5(850), 8(900), 4(1700/2100), 2(1900), 1(2100)

Bands 5(850), 8(900), 2(1900), 1(2100)

Data Speed:

LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s

Dual SIM:

Yes

SIM type:

Nano SIM

VoLTE:

Yes

Multimedia

Headphones:

3.5mm jack

Speakers:

Earpiece, Loudspeaker

Screen mirroring:

Wireless screen share

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)

Type-C (reversible), USB 2.0

Features:

Charging

Charging, OTG

Charging

Location:

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

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

NFC

Buyers information

Price:

$ 249

€ 179

€ 240

User Manual:

This is the official Samsung Galaxy A21s User Guide in English provided from the manufacturer.

In The Box:

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

30W Dart Charger, USB Type-C Cable, Protect Case, Protect Film, SIM Card Tool, Important Info Booklet with Warranty Card

Availability

Officially announced:

Mar 23, 2020

Oct 07, 2020

May 15, 2020