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Xiaomi Redmi Note 8 2021 vs Samsung Galaxy S21 vs Samsung Galaxy S10

Compare phone and tablet specifications of up to three devices at once.

Comparison mode:

Display

Size:

6.3 inches
6.2 inches
6.1 inches

Resolution:

2340 x 1080 pixels, 19.5:9 ratio, 409 PPI
2400 x 1080 pixels, 20:9 ratio, 424 PPI
3040 x 1440 pixels, 19:9 ratio, 550 PPI

Technology:

IPS LCD
Dynamic AMOLED
Dynamic AMOLED

Refresh rate:

60Hz
120Hz (adaptive)

Screen-to-body:

81.89 %
86.06 %
88.66 %

Peak brightness:

1300 cd/m2 (nit)

Features:

Scratch-resistant glass (Corning Gorilla Glass 5), Ambient light sensor, Proximity sensor
HDR support, Scratch-resistant glass (Corning Gorilla Glass Victus), Ambient light sensor, Proximity sensor
HDR support, Scratch-resistant glass (Corning Gorilla Glass 6), Ambient light sensor, Proximity sensor

Hardware

System chip:

MediaTek Helio G85 MT6769Z
Qualcomm Snapdragon 888
Qualcomm Snapdragon 855

Processor:

Octa-core, 2000 MHz, Cortex-A75, 64-bit, 12 nm
Octa-core, 2840 MHz, Kryo 680, 64-bit, 5 nm
Octa-core, 2840 MHz, Kryo 485, 64-bit, 7 nm

GPU:

Mali G52 MC2
Adreno 660
Adreno 640

RAM:

4GB LPDDR4
8GB LPDDR5
8GB LPDDR4

Internal storage:

64GB (eMMC 5.1)
128GB (UFS 3.0), not expandable
128GB

Storage expansion:

microSDXC up to 128 GB
microSDXC up to 512 GB

Device type:

Smartphone
Smartphone
Smartphone

OS:

Android (11), MIUI 12.5 UI
Android (12, 11), Samsung One UI
Android (11, 10, 9.0 Pie), Samsung One UI

Battery

Capacity:

4000 mAh
4000 mAh
3400 mAh

Type:

Li - Polymer, Not user replaceable
Li - Polymer, Not user replaceable
Li - Ion, Not user replaceable

Battery life test results:

Charging:

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

Main camera:

48 MP (Autofocus)
12 MP (OIS, PDAF)
12 MP (OIS, PDAF)

Specifications:

Aperture size: F1.8; Sensor size: 1/2"; Pixel size: 0.8 μm
Aperture size: F1.8; Focal length: 26 mm; Sensor size: 1/1.76"; Pixel size: 1.8 μm
Aperture size: F1.5/F2.4; Focal length: 26 mm; Sensor size: 1/2.55"; Pixel size: 1.4 μm

Second camera:

8 MP (Ultra-wide)
64 MP (Telephoto, OIS, PDAF)
12 MP (Telephoto, OIS, PDAF)

Specifications:

Aperture size: F2.2; Sensor size: 1/4"; Pixel size: 1.12 μm
Aperture size: F2.0; Focal Length: 29 mm; Sensor size: 1/1.7"; Pixel size: 0.8 μm
Optical zoom: 2.0x; Aperture size: F2.4; Focal Length: 52 mm; Sensor size: 1/3.6"; Pixel size: 1 μm

Third camera:

2 MP (Macro, Autofocus)
12 MP (Ultra-wide, Autofocus)
16 MP (Ultra-wide)

Specifications:

Aperture size: F2.4; Pixel size: 1.75 μm
Aperture size: F2.2; Focal Length: 13 mm; Sensor size: 1/2.55"; Pixel size: 1.4 μm
Aperture size: F2.2; Focal Length: 12 mm; Sensor size: 1/3.1"; Pixel size: 1 μm

Fourth camera:

2 MP (Depth information)

Specifications:

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

Video recording:

1920x1080 (Full HD) (30 fps), 1280x720 (HD) (120 fps)
7680x4320 (8K UHD) (24 fps), 3840x2160 (4K UHD) (60 fps), 1920x1080 (Full HD) (240 fps), 1280x720 (HD) (960 fps)
3840x2160 (4K UHD) (60 fps), 1920x1080 (Full HD) (240 fps), 1280x720 (HD) (960 fps)

Features:

OIS, HDR, Hyperlapse, Continuous autofocus, Video light, EIS
HDR, Time-lapse video, Hyperlapse, Picture-taking during video recording, Video light, EIS, Video calling, Video sharing

Front:

13 MP
10 MP (PDAF, HDR)
10 MP (Autofocus, HDR)

Video capture:

1920x1080 (Full HD)
3840x2160 (4K UHD) (60 fps)
3840x2160 (4K UHD)

Design

Dimensions:

6.23 x 2.96 x 0.33 inches (158.3 x 75.3 x 8.35 mm)
5.97 x 2.80 x 0.31 inches (151.7 x 71.2 x 7.9 mm)
5.90 x 2.77 x 0.31 inches (149.9 x 70.4 x 7.8 mm)

Weight:

6.70 oz (190.0 g)
6.03 oz (171.0 g)
5.54 oz (157.0 g)

Materials:

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

Resistance:

Water, Dust; IP68
Water, Dust; IP68

Biometrics:

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

Keys:

Right: Volume control, Lock/Unlock key
Right: Volume control, Lock/Unlock key
Left: Volume control, Other; Right: Lock/Unlock key

Colors:

Neptune Blue, Moonlight White, Space Black,
Phantom pink, Violet, Gray, White
Prism blue, Prism black, Prism white, Prism green, Flamingo pink

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)
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), 17(700 b), 18(800 Lower), 19(800 Upper), 20(800 DD), 25(1900+), 26(850+), 28(700 APT), 29(700 d), 30(2300 WCS), 66(AWS-3), 71(600)

LTE (TDD):

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

UMTS:

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

Data Speed:

LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSPA
LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s, UMTS
LTE-A Pro Cat 20 (2000/150 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s

Dual SIM:

Shared with microSD

SIM type:

Nano SIM
Nano SIM
Nano SIM

HD Voice:

Yes
Yes

VoLTE:

Yes

Multimedia

Headphones:

3.5mm jack
No 3.5mm jack
3.5mm jack

Speakers:

Earpiece, Loudspeaker
Earpiece, Multiple speakers
Earpiece, Multiple speakers

Features:

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

Screen mirroring:

Wireless screen share
Wireless screen share
Wireless screen share

Radio:

FM, Stereo, RDS
FM

Additional microphone(s):

for Noise cancellation
for Noise cancellation, Video recording
for Noise cancellation

Connectivity & Features

Bluetooth:

5.2
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, ax (Wi-Fi 6), dual-band; MIMO, Wi-Fi Direct, Hotspot
802.11 a, b, g, n, ac, ax, dual-band; MIMO, Wi-Fi Direct, Hotspot

USB:

Type-C (reversible), USB 2.0
Type-C (reversible), USB 3.2
Type-C (reversible), USB 3.1

Features:

Charging, OTG
Charging, Headphones port, OTG, Video out
Charging, OTG, Video out

Location:

GPS, A-GPS, Glonass, Galileo, Cell ID, Wi-Fi positioning
GPS, A-GPS, Glonass, Galileo, 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
Accelerometer, Gyroscope, Compass, Hall (for flip covers), Heart rate, Barometer

Other:

Infrared
NFC, ANT+
NFC, ANT+

Hearing aid compatible:

M3, T3
M4, T4

Regulatory Approval

FCC approval:

Date approved:

Dec 08, 2020
Feb 01, 2019

FCC ID value:

A3LSMG991U
A3LSMG973U

Measured SAR:

Head:

0.36 W/kg
0.39 W/kg

Body:

1.08 W/kg
1.37 W/kg

Simultaneous Transmission:

3.96 W/kg
1.59 W/kg

Wireless Router:

1.09 W/kg
1.35 W/kg

Phablet:

2.49 W/kg
3.99 W/kg

Buyers information

Price:

$ 800
$ 900

In The Box:

Adapter, USB Type-C cable, SIM Eject Tool, Protective Case, Quick Start Guide, Warranty Card
C to C Data Cable, Ejection Pin
Data cable, Travel adapter, Ejection Pin, USB Connector (OTG), Earphones by AKG, Quick Start Guide, Protective film

Availability

Officially announced:

May 24, 2021
Jan 14, 2021
Feb 20, 2019
FCC OKs Cingular\'s purchase of AT&T Wireless