Xiaomi Redmi 9 vs Samsung Galaxy S21 - specs comparison

Display

Size:

6.5 inches

6.2 inches

Resolution:

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

2400 x 1080 pixels, 20:9 ratio, 424 PPI

Technology:

IPS LCD

Dynamic AMOLED

Screen-to-body:

83.27 %

86.06 %

Peak brightness:

1300 cd/m2 (nit)

Features:

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

120Hz refresh rate (adaptive), HDR support, Scratch-resistant glass (Corning Gorilla Glass Victus), Ambient light sensor, Proximity sensor

Hardware

System chip:

MediaTek Helio G80

Qualcomm Snapdragon 888

Processor:

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

Octa-core, 2840 MHz, Kryo 680, 64-bit, 5 nm

GPU:

Mali G52 MC2

Adreno 660

RAM:

3GB LPDDR4

8GB LPDDR5

Internal storage:

32GB (eMMC 5.1)

128GB (UFS 3.0), not expandable

Storage expansion:

microSDXC

Device type:

Smartphone

OS:

Android

Android (11), Samsung One UI

Battery

Capacity:

5020 mAh

4000 mAh

Type:

Not user replaceable

Li - Polymer, Not user replaceable

Battery life test results:

link

Charging:

Qualcomm Quick Charge 3.0

Qualcomm Quick Charge 2.0, USB Power Delivery, Samsung Adaptive Fast Charging, Qi and Powermat wireless charging, Reverse wireless charging

Max charge speed:

Wired: 18.0W

Wired: 25.0W; Wireless: 15.0W

Camera

Rear:

Quad camera

Triple camera

Main camera:

13 MP (PDAF)

12 MP (OIS, PDAF)

Specifications:

F2.2

F1.8; 26 mm; 1/1.76"; 1.8 μm

Second camera:

8 MP (Ultra-wide)

64 MP (Telephoto, OIS, PDAF)

Specifications:

Aperture size: F2.2

Aperture size: F2.0; Focal Length: 29 mm; Sensor size: 1/1.7"; Pixel size: 0.8 μm

Third camera:

5 MP (Macro)

12 MP (Ultra-wide, Autofocus)

Specifications:

Aperture size: F2.4

Aperture size: F2.2; Focal Length: 13 mm; Sensor size: 1/2.55"; Pixel size: 1.4 μm

Fourth camera:

2 MP (Depth information)

Video recording:

1920x1080 (Full HD)

7680x4320 (8K UHD) (24 fps), 3840x2160 (4K UHD) (60 fps), 1920x1080 (Full HD) (240 fps), 1280x720 (HD) (960 fps)

Features:

OIS, HDR, Hyperlapse, Continuous autofocus, Video light, EIS

Front:

8 MP (HDR)

10 MP (PDAF, HDR)

Video capture:

1920x1080 (Full HD)

3840x2160 (4K UHD) (60 fps)

Design

Dimensions:

6.43 x 3.03 x 0.36 inches (163.32 x 77.01 x 9.1 mm)

5.97 x 2.80 x 0.31 inches (151.7 x 71.2 x 7.9 mm)

Weight:

6.98 oz (198.0 g)

6.03 oz (171.0 g)

Materials:

Back: Plastic; Frame: Aluminum

Resistance:

Water, Dust; IP68

Biometrics:

2D Face unlock, Fingerprint (touch)

2D Face unlock, Ultrasonic in-screen fingerprint

Keys:

Right: Volume control, Lock/Unlock key

Colors:

Carbon gray, Sunset purple, Ocean green

Phantom pink, Violet, Gray, White

Cellular

5G:

n2, n5, n12, n25, n41, n66, n71, n77, n260, n261, SA, NSA, Sub-6, mmWave

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), 4(AWS-1), 5(850), 7(2600), 8(900), 12(700 a), 13(700 c), 14(700 PS), 18(800 Lower), 19(800 Upper), 20(800 DD), 25(1900+), 26(850+), 28(700 APT), 30(2300 WCS), 66(AWS-3), 71(600)

LTE (TDD):

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

Bands 38(2600), 39(1900+), 40(2300), 41(2600+), 46, 48(3600)

UMTS:

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

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

Data Speed:

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

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

Dual SIM:

Yes

SIM type:

Nano SIM

HD Voice:

Yes

VoLTE:

Yes

Multimedia

Headphones:

3.5mm jack

No 3.5mm jack

Speakers:

Earpiece, Loudspeaker

Earpiece, Multiple speakers

Features:

32-Bit DAC, Dolby Atmos, aptX, Dolby Digital, Dolby Digital Plus

Screen mirroring:

Wireless screen share

Radio:

FM

FM, Stereo, RDS

Additional microphone(s):

for Noise cancellation

for Noise cancellation, Video recording

Connectivity & Features

Bluetooth:

5.0

Wi-Fi:

802.11 b, g, n; Wi-Fi Direct, Hotspot

802.11 a, b, g, n, ac, ax (Wi-Fi 6), dual-band; MIMO, Wi-Fi Direct, Hotspot

USB:

Type-C (reversible), USB 2.0

Type-C (reversible), USB 3.2

Features:

Charging

Charging, Headphones port, OTG, Video out

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, Compass, Hall (for flip covers), Barometer

Other:

NFC, Infrared

NFC, ANT+

Hearing aid compatible:

M3, T3

Regulatory Approval

FCC approval:

Date approved:

Dec 08, 2020

FCC ID value:

A3LSMG991U link

Measured SAR:

Head:

0.36 W/kg

Body:

1.08 W/kg

Simultaneous Transmission:

3.96 W/kg

Wireless Router:

1.09 W/kg

Phablet:

2.49 W/kg

Buyers information

Price:

$ 800

In The Box:

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

C to C Data Cable, Ejection Pin

Availability

Officially announced:

Jan 14, 2021