Xiaomi Mi 6 vs Samsung Galaxy S21 vs Samsung Galaxy S9 - specs comparison

Display

Size:

5.2 inches

6.2 inches

5.8 inches

Resolution:

1920 x 1080 pixels, 428 PPI

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

2960 x 1440 pixels, 18.5:9 ratio, 568 PPI

Technology:

IPS LCD

Dynamic AMOLED

Super AMOLED

Screen-to-body:

71.27 %

86.06 %

84.36 %

Peak brightness:

600 cd/m2 (nit)

1300 cd/m2 (nit)

Features:

Ambient light sensor, Proximity sensor

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

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

Hardware

System chip:

Qualcomm Snapdragon 835 MSM8998

Qualcomm Snapdragon 888

Qualcomm Snapdragon 845 SDM845

Processor:

Octa-core, 2457 MHz, Kryo 280, 64-bit, 10 nm

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

Octa-core, 2800 MHz, Kryo 385, 64-bit, 10 nm

GPU:

Adreno 540

Adreno 660

Adreno 630

RAM:

6GB LPDDR4

8GB LPDDR5

4GB LPDDR4

Internal storage:

128GB

128GB (UFS 3.0), not expandable

64GB

Storage expansion:

microSDXC up to 400 GB

Device type:

Smartphone

OS:

Android (9.0 Pie, 8.1 Oreo, 7.1 Nougat), Xiaomi MI UI

Android (11), Samsung One UI

Android (10, 9.0 Pie, 8.0 Oreo), Samsung One UI

Battery

Capacity:

3350 mAh

4000 mAh

3000 mAh

Type:

Li - Polymer, Not user replaceable

Li - Ion, Not user replaceable

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

Qualcomm Quick Charge 2.0, Samsung Adaptive Fast Charging, Qi and Powermat wireless charging

Max charge speed:

Wired: 25.0W; Wireless: 15.0W

Camera

Rear:

Dual camera

Triple camera

Single camera

Main camera:

12 MP (OIS, PDAF)

Specifications:

F1.8; 27 mm; 1/2.9"; 1.25 μm

F1.8; 26 mm; 1/1.76"; 1.8 μm

F1.5/F2.4; 1/2.55"; 1.4 μm

Second camera:

12 MP (Telephoto, Autofocus)

64 MP (Telephoto, OIS, PDAF)

Specifications:

Optical zoom: 2.0x; Aperture size: F2.6; Focal Length: 52 mm; Pixel size: 1 μm

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

Third camera:

12 MP (Ultra-wide, Autofocus)

Specifications:

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

Video recording:

3840x2160 (4K UHD) (30 fps), 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:

Video calling, Video sharing

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

HDR, Time-lapse video, Hyperlapse, Continuous autofocus, Object tracking, Picture-taking during video recording, Video calling, Video sharing

Front:

8 MP

10 MP (PDAF, HDR)

8 MP (Autofocus, HDR)

Video capture:

1920x1080 (Full HD)

3840x2160 (4K UHD) (60 fps)

2560x1440 (QHD) (30 fps)

Design

Dimensions:

5.72 x 2.78 x 0.29 inches (145.17 x 70.49 x 7.45 mm)

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

5.81 x 2.70 x 0.33 inches (147.7 x 68.7 x 8.5 mm)

Weight:

5.93 oz (168.0 g)

6.03 oz (171.0 g)

5.75 oz (163.0 g)

Materials:

Back: Glass; Frame: Metal

Back: Plastic; Frame: Aluminum

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

Resistance:

Splash

Water, Dust; IP68

Biometrics:

Fingerprint (touch)

2D Face unlock, Ultrasonic in-screen fingerprint

Iris scanner, 2D Face unlock, Fingerprint (touch)

Features:

Notification light

Keys:

Right: Volume control, Lock/Unlock key

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

Colors:

Black, Blue, White

Phantom pink, Violet, Gray, White

Midnight black, Coral blue, Titanium gray, Lilac purple, Burgundy red, Sunrise gold, Ice blue

Cellular

5G:

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

LTE (FDD):

Bands 1(2100), 3(1800), 5(850), 7(2600), 8(900)

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

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

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

UMTS:

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

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

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

Data Speed:

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

LTE-A Pro Cat 18 (1200/150 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA

Dual SIM:

Yes

SIM type:

Nano SIM

Multimedia

Headphones:

No 3.5mm jack

3.5mm jack

Speakers:

Earpiece, Multiple speakers

Features:

Album art cover, Background playback

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

32-Bit DAC, aptX-HD

Screen mirroring:

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:

5.0

Wi-Fi:

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

USB:

Type-C (reversible)

Type-C (reversible), USB 3.2

Type-C (reversible), USB 3.1

Features:

Mass storage device, Charging, Headphones port

Charging, Headphones port, OTG, Video out

Charging, OTG, Video out

Location:

GPS, A-GPS, Glonass, BeiDou

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

GPS, A-GPS, Glonass, Galileo, BeiDou

Sensors:

Accelerometer, Gyroscope, Compass, Hall (for flip covers), Barometer

Other:

NFC, Infrared, Tethering, Computer sync, OTA sync

NFC, ANT+

Hearing aid compatible:

M3, T3

Regulatory Approval

FCC approval:

Date approved:

Dec 08, 2020

Jan 11, 2018

FCC ID value:

A3LSMG991U link

A3LSMG960U link

Measured SAR:

Head:

0.36 W/kg

0.35 W/kg

Body:

1.08 W/kg

0.96 W/kg

Simultaneous Transmission:

3.96 W/kg

1.59 W/kg

Wireless Router:

1.09 W/kg

0.95 W/kg

Phablet:

2.49 W/kg

Buyers information

Price:

$ 421

$ 800

$ 720

In The Box:

Charger, USB Type C cable, Type C to 3.5mm adapter, Getting started guide, Warranty, SIM removal tool

C to C Data Cable, Ejection Pin

Availability

Officially announced:

Apr 19, 2017

Jan 14, 2021

Feb 25, 2018