Comparison between:
- Xiaomi Mi A3
- Xiaomi Redmi K20
- Meizu Note 9
- Xiaomi Redmi Note 8 Pro

Brand and model

Information about the brand, model and model alias (if any) of a specific device.

Xiaomi Mi A3Xiaomi Redmi K20Meizu Note 9Xiaomi Redmi Note 8 Pro
Xiaomi Mi A3
Prices
Xiaomi Redmi K20
Prices
Meizu Note 9
Prices
Xiaomi Redmi Note 8 Pro
Prices
Model aliasM1906F9SH
M1906F9SI
MZB7757INNote9
M923Q
Redmi Note8 Pro
Red Rice Note 8 Pro
Red Rice Note8 Pro
G7
2015105
M1906G7G
M1906G7I
M1906G7E
M1906G7T

Design

Information about the dimensions and weight of the device, shown in different measurement units. Body materials, available colors, certifications.

Width71.85 mm
7.19 cm
0.24 ft
2.83 in
74.3 mm
7.43 cm
0.24 ft
2.93 in
74.4 mm
7.44 cm
0.24 ft
2.93 in
76.4 mm
7.64 cm
0.25 ft
3.01 in
Height153.48 mm
15.35 cm
0.5 ft
6.04 in
156.7 mm
15.67 cm
0.51 ft
6.17 in
153.1 mm
15.31 cm
0.5 ft
6.03 in
161.35 mm
16.14 cm
0.53 ft
6.35 in
Thickness8.48 mm
0.85 cm
0.03 ft
0.33 in
8.8 mm
0.88 cm
0.03 ft
0.35 in
8.65 mm
0.87 cm
0.03 ft
0.34 in
8.79 mm
0.88 cm
0.03 ft
0.35 in
Weight173 g
0.38 lbs
6.13 oz
191 g
0.42 lbs
6.74 oz
169 g
0.37 lbs
5.99 oz
199 g
0.44 lbs
7.05 oz
Volume93.46 cm³
5.68 in³
102.46 cm³
6.22 in³
98.53 cm³
5.98 in³
108.36 cm³
6.58 in³
ColorsBlack
White
Blue
Black
Blue
Red
Black
Blue
White
Mineral Grey
Pearl White
Forest Green
Body materialsGlass
Plastic
Aluminium alloy
Glass
MetalGlass
Plastic
Certification---IP52

SIM card

The Subscriber Identity Module (SIM) is used in mobile devices for storing data authenticating the subscribers of mobile services.

SIM card typeNano-SIM / microSD
Nano-SIM
Nano-SIMNano-SIMNano-SIM
Nano-SIM / microSD
Number of SIM cards2222
Features-Dual SIM stand-by (Both cards are active. When one is busy, the other is not active)Dual SIM stand-by (Both cards are active. When one is busy, the other is not active)Dual SIM stand-by (Both cards are active. When one is busy, the other is not active)

Networks

A mobile (cellular) network is a radio system, which allows a large number of mobile devices to communicate with each other.

GSMGSM 850 MHz
GSM 900 MHz
GSM 1800 MHz
GSM 1900 MHz
GSM 850 MHz (B5)
GSM 900 MHz (B8)
GSM 1800 MHz (B3)
GSM 1900 MHz (B2)
GSM 850 MHz
GSM 900 MHz
GSM 1800 MHz
GSM 1900 MHz
GSM 850 MHz (B5)
GSM 900 MHz (B8)
GSM 1800 MHz (B3)
GSM 1900 MHz (B2)
CDMA--CDMA 800 MHzCDMA 800 MHz (BC0)
W-CDMAW-CDMA 850 MHz
W-CDMA 900 MHz
W-CDMA 1700 MHz
W-CDMA 1900 MHz
W-CDMA 2100 MHz
W-CDMA 850 MHz (B5)
W-CDMA 900 MHz (B8)
W-CDMA 1900 MHz (B2)
W-CDMA 2100 MHz (B1)
-W-CDMA 850 MHz (B5)
W-CDMA 900 MHz (B8)
W-CDMA 2100 MHz (B1)
TD-SCDMA--TD-SCDMA 1880-1920 MHz
TD-SCDMA 2010-2025 MHz
TD-SCDMA 1900 MHz
TD-SCDMA 2000 MHz
UMTS--UMTS 850 MHz
UMTS 900 MHz
UMTS 2100 MHz
-
LTELTE-TDD 1900 MHz (B39)
LTE-TDD 2300 MHz (B40)
LTE-TDD 2500 MHz (B41)
LTE-TDD 2600 MHz (B38)
LTE 800 MHz
LTE 850 MHz
LTE 900 MHz
LTE 1700/2100 MHz
LTE 1800 MHz
LTE 1900 MHz
LTE 2100 MHz
LTE 2600 MHz
LTE 700 MHz (B28)
LTE-FDD 850 MHz (B5)
LTE-FDD 900 MHz (B8)
LTE-FDD 1800 MHz (B3)
LTE-FDD 2100 MHz (B1)
LTE-FDD 2600 MHz (B7)
LTE-TDD 2300 MHz (B40)
LTE-TDD 2500 MHz (B41)
LTE-TDD 2600 MHz (B38)
LTE 850 MHz
LTE 900 MHz
LTE 1800 MHz
LTE 2100 MHz
LTE-TDD 1900 MHz (B39)
LTE-TDD 2300 MHz (B40)
LTE-TDD 2500 MHz (B41)
LTE-TDD 2600 MHz (B38)
LTE-TDD 2000 MHz (B34)
LTE-FDD 850 MHz (B5)
LTE-FDD 900 MHz (B8)
LTE-FDD 1800 MHz (B3)
LTE-FDD 2100 MHz (B1)
LTE-FDD 2600 MHz (B7)
LTE-TDD 1900 MHz (B39)
LTE-TDD 2000 MHz (B34)
LTE-TDD 2300 MHz (B40)
LTE-TDD 2500 MHz (B41)
LTE-TDD 2600 MHz (B38)

Mobile network technologies and bandwidth

Communication between devices within mobile networks is realized via various generations of network technologies, which provide different bandwidth.

Mobile network technologiesUMTS
EDGE
GPRS
HSPA+
LTE Cat 12
UMTS
EDGE
GPRS
HSPA+
LTE Cat 15
EV-DO Rev. A
TD-SCDMA
TD-HSDPA
UMTS
EDGE
GPRS
HSPA+
LTE Cat 12
EV-DO Rev. A
TD-SCDMA
TD-HSDPA
UMTS
EDGE
GPRS
HSPA+
LTE Cat 12
EV-DO Rev. A
TD-SCDMA
TD-HSDPA
---3CA
256-QAM
4x4 MIMO

Operating system

Operating system is the system software, which manages and controls the functioning of the hardware components of the device.

Operating system (OS)Android 9.0 PieMIUI V10.2 (Android 9.0 Pie)FlyMe 7.2 (Android 9.0 Pie)MIUI V10 (Android 9.0 Pie)

System on Chip (SoC)

A system on a chip (SoC) includes into a single chip some of the main hardware components of the mobile device.

SoCQualcomm Snapdragon 665Qualcomm Snapdragon 730Qualcomm Snapdragon 675MediaTek Helio G90T (MT6785T)
Process technology11 nm8 nm11 nm12 nm
CPU4x 2.0 GHz Kryo 260, 4x 1.8 GHz Kryo 2602x 2.2 GHz Kryo 470, 6x 1.8 GHz Kryo 4702x 2.0 GHz Kryo 460, 6x 1.7 GHz Kryo 4602x 2.05 GHz Cortex-A76, 6x 2.0 GHz Cortex-A55
CPU bits64 bit64 bit64 bit64 bit
Instruction setARMv8ARMv8ARMv8ARMv8.2-A
CPU cores8888
CPU frequency2000 MHz2200 MHz2000 MHz2050 MHz
GPUQualcomm Adreno 610Qualcomm Adreno 618Qualcomm Adreno 612ARM Mali-G76 3EEMC4
GPU cores---4
GPU frequency---800 MHz
RAM capacity4 GB6 GB
8 GB
4 GB
6 GB
6 GB
8 GB
RAM typeLPDDR4XLPDDR4XLPDDR4XLPDDR4X
RAM channelsDouble channelDouble channelDouble channelDouble channel
RAM frequency1866 MHz1866 MHz1866 MHz2133 MHz
Game Turbo 2.0Mi Turbo
Game Turbo 2.0
-MediaTek HyperEngine
Mi Turbo
Game Turbo 2.0
Liquid cooling system

Storage

Every mobile device has a built-in storage (internal memory) with a fixed capacity.

Storage64 GB
128 GB
64 GB
128 GB
256 GB
64 GB
128 GB
64 GB
128 GB
UFS 2.1UFS 2.1-UFS 2.1

Memory cards

Memory cards are used in mobile devices for expanding their external storage capacity.

TypesmicroSD
microSDHC
microSDXC
--microSD
microSDHC
microSDXC

Display

The display of a mobile device is characterized by its technology, resolution, pixel density, diagonal length, color depth, etc.

Type/technologyAMOLEDSuper AMOLEDIPSIPS
Diagonal size6.09 in
154.64 mm
15.46 cm
6.39 in
162.31 mm
16.23 cm
6.2 in
157.48 mm
15.75 cm
6.53 in
165.86 mm
16.59 cm
Width2.55 in
64.8 mm
6.48 cm
2.68 in
68.02 mm
6.8 cm
2.69 in
68.29 mm
6.83 cm
2.74 in
69.51 mm
6.95 cm
Height5.53 in
140.4 mm
14.04 cm
5.8 in
147.37 mm
14.74 cm
5.59 in
141.9 mm
14.19 cm
5.93 in
150.6 mm
15.06 cm
Aspect ratio2.167:12.167:12.078:12.167:1
Resolution720 x 1560 pixels1080 x 2340 pixels1080 x 2244 pixels1080 x 2340 pixels
Pixel density282 ppi
110 ppcm
403 ppi
158 ppcm
402 ppi
158 ppcm
395 ppi
155 ppcm
Color depth24 bit
16777216 colors
24 bit
16777216 colors
24 bit
16777216 colors
24 bit
16777216 colors
Display area82.77 %86.37 %85.35 %85.19 %
Other featuresCapacitive
Multi-touch
Scratch resistant
Capacitive
Multi-touch
Scratch resistant
Capacitive
Multi-touch
Capacitive
Scratch resistant
Corning Gorilla Glass 5
60000:1 contrast ratio
350 cd/m²
Peak brightness - 530 cd/m²
102.7% NTSC
HDR10
Corning Gorilla Glass 6
2.5D curved glass screen
60000:1 contrast ratio
430 cd/m²
Peak brightness - 600 cd/m²
103.8% NTSC
Always-On Display
DCI-P3
HDR10
2.5D curved glass screen
450 cd/m²
2.5D curved glass screen
Corning Gorilla Glass 5
Oleophobic coating
TÜV Rheinland certification for low blue light emissions
Chip-on-foil (COF) IC packaging technology
1500:1 contrast ratio
500 cd/m² typical brightness
420 cd/m² minimum brightness
84% NTSC
HDR

Sensors

Different sensors measure different physical quantities and convert them into signals recognizable by the mobile device.

SensorsProximity
Light
Accelerometer
Compass
Gyroscope
Fingerprint
Proximity
Light
Accelerometer
Compass
Gyroscope
Barometer
Fingerprint
Hall
Proximity
Light
Accelerometer
Compass
Gyroscope
Fingerprint
Proximity
Light
Accelerometer
Compass
Gyroscope
Fingerprint
In-display fingerprint sensorIn-display fingerprint sensor
Step detector
Step counter
--

Rear camera

The primary camera of the mobile device is usually placed on its back and can be combined with one or more additional cameras.

Sensor modelSony IMX586 Exmor RSSony IMX582 Exmor RSSamsung S5KGM1Samsung S5KGW1
Sensor typeCMOSCMOS BSI-ISOCELL
Sensor format1/2"1/2"1/2"1/1.72"
Pixel size0.8 µm
0.000800 mm
0.8 µm
0.000800 mm
0.8 µm
0.000800 mm
0.8 µm
0.000800 mm
ISO-100 - 320050 - 1600-
Aperturef/1.79f/1.75f/1.7f/1.7
Focal length and 35 mm equivalent4.71 mm4.77 mm
26 mm *(35 mm / full frame)
--
Field of view---79 °
Number of lenses6666
Flash typeDual LEDDual LEDDual LEDDual LED
Image resolution8000 x 6000 pixels
48 MP
8000 x 6000 pixels
48 MP
8000 x 6000 pixels
48 MP
9248 x 6936 pixels
64.14 MP
Video resolution3840 x 2160 pixels
8.29 MP
3840 x 2160 pixels
8.29 MP
1920 x 1080 pixels
2.07 MP
3840 x 2160 pixels
8.29 MP
Video FPS30 fps30 fps30 fps30 fps
FeaturesAutofocus
Continuous shooting
Digital zoom
Geotagging
Panorama
HDR
Touch focus
Face detection
White balance settings
ISO settings
Exposure compensation
Self-timer
Scene mode
Phase detection autofocus (PDAF)
Autofocus
Continuous shooting
Digital zoom
Optical zoom
Digital image stabilization
Geotagging
Panorama
HDR
Touch focus
Face detection
White balance settings
ISO settings
Exposure compensation
Self-timer
Scene mode
Macro mode
RAW
Phase detection autofocus (PDAF)
Contrast detection autofocus (CDAF)
Autofocus
Continuous shooting
Digital zoom
Geotagging
Panorama
HDR
Touch focus
Face detection
White balance settings
ISO settings
Exposure compensation
Self-timer
Scene mode
Phase detection autofocus (PDAF)
Autofocus
Digital zoom
Digital image stabilization
Geotagging
Panorama
HDR
Touch focus
Face detection
White balance settings
ISO settings
Exposure compensation
Self-timer
Scene mode
Macro mode
Phase detection autofocus (PDAF)
Pixel size - 1.6 μm (4-in-1 pixel binning)
1080p @ 120 fps
720p @ 240 fps
Secondary rear camera - 8 MP (ultra-wide angle)
Pixel size - 1.12 μm (#2)
Aperture size - f/2.2 (#2)
Angle of view - 118° (#2)
Third rear camera - 2 MP
Pixel size - 1.75 μm (#3)
Aperture size - f/2.4 (#3)
Pixel size - 1.6 μm (4-in-1 pixel binning)
1080p @ 960 fps
720p @ 960 fps
Secondary rear camera - 8 MP (telephoto)
Sensor model - OmniVision OV8856 (#2)
Sensor type - PureCel (#2)
Sensor size - 3.6783 x 2.76768 mm (#2)
Aperture size - f/2.4 (#2)
5-element lens (#2)
Focal length (35 mm equivalent) - 52 mm (#2)
Angle of view - 44.6° (#2)
2x Optical zoom (#2)
Third rear camera - 13 MP (ultra-wide angle)
Sensor model - Samsung S5K3L6 (#3)
Sensor type - ISOCELL (#3)
Sensor size - 1/3.1" (#3)
Pixel size - 1.12 μm (#3)
Aperture size - f/2.4 (#3)
5-element lens (#3)
Focal length (35 mm equivalent) - 15 mm (#3)
Angle of view - 124.8° (#3)
Pixel size - 1.6 μm (4-in-1 pixel binning)
Sensor type - ISOCELL PLUS
Phase detection with Dual Pixel
Secondary rear camera - 5 MP
4-element lens (#2)
Pixel size - 1.6 μm (4-in-1 pixel binning)
Sensor type - ISOCELL PLUS
Super Phase Detection
1080p @ 120 fps
720p @ 960 fps
Secondary rear camera - 8 MP (ultra-wide)
Sensor size - 1/4" (#2)
Pixel size - 1.12 μm (#2)
Aperture size - f/2.2 (#2)
Angle of view - 120° (#2)
Focal length (35 mm equivalent) - 13 mm (#2)
Third rear camera - 2MP (depth-sensing)
Sensor size - 1/5" (#3)
Pixel size - 1.75 μm (#3)
Aperture size - f/2.4 (#3)
Fourth rear camera - 2MP (macro)
Sensor size - 1/5" (#4)
Pixel size - 1.75 μm (#4)
Aperture size - f/2.4 (#4)

Front camera

Modern smartphones have one or more front cameras and their positioning has led to various design concepts – pop-up camera, rotating camera, notch, punch hole, under-display camera, etc.

Sensor modelSamsung S5KGD1--Samsung S5K3T1
Sensor type---ISOCELL
Sensor format---1/3.1"
Pixel size0.8 µm
0.000800 mm
0.8 µm
0.000800 mm
-0.9 µm
0.000900 mm
Aperturef/2f/2.2f/2f/2
Focal length and 35 mm equivalent3.85 mm3.52 mm
18 mm *(35 mm / full frame)
--
Field of view79 °---
Number of lenses5---
Image resolution6560 x 4920 pixels
32.28 MP
5184 x 3880 pixels
20.11 MP
5180 x 3880 pixels
20.1 MP
5184 x 3880 pixels
20.11 MP
Video resolution1920 x 1080 pixels
2.07 MP
1920 x 1080 pixels
2.07 MP
1920 x 1080 pixels
2.07 MP
1920 x 1080 pixels
2.07 MP
Video FPS30 fps30 fps30 fps30 fps
FeaturesFace unlock-Face unlockFace unlock
Sensor type - ISOCELL PLUSMechanical pop-up front camera
Sapphire glass cover
-Pixel size - 1.8 μm (4-in-1 pixel binning)
HDR

Audio

Information about the type of speakers and the audio technologies supported by the device.

SpeakerLoudspeaker
Earpiece
Loudspeaker
Earpiece
Loudspeaker
Earpiece
Loudspeaker
Earpiece
Hi-Res Audio
Smart PA
Smart PA-Smart PA 10V Boost
1217 super-linear speaker
Active noise cancellation with a dedicated microphone

Radio

The radio in a mobile device is a built-in FM radio receiver.

RadioYesNoNoYes

Tracking/Positioning

Information about the positioning and navigation technologies supported by the device.

Tracking/PositioningGPS
A-GPS
GLONASS
BeiDou
GPS
A-GPS
GLONASS
BeiDou
GPS
A-GPS
GLONASS
BeiDou
GPS
A-GPS
GLONASS
BeiDou

Wi-Fi

Wi-Fi is a technology that provides wireless data connections between various devices within a short range.

Wi-Fi802.11a
802.11b
802.11g
802.11n
802.11n 5GHz
802.11ac
Dual band
Wi-Fi Hotspot
Wi-Fi Direct
Wi-Fi Display
802.11a
802.11b
802.11g
802.11n
802.11n 5GHz
802.11ac
Dual band
Wi-Fi Hotspot
Wi-Fi Direct
Wi-Fi Display
802.11a
802.11b
802.11g
802.11n
802.11n 5GHz
802.11ac
Dual band
Wi-Fi Hotspot
Wi-Fi Direct
802.11a
802.11b
802.11g
802.11n
802.11n 5GHz
802.11ac
Dual band
Wi-Fi Hotspot
Wi-Fi Direct
Wi-Fi Display
-2x2 MiMO--

Bluetooth

Bluetooth is a standard for secure wireless data transfer between different types of devices over short distances.

Version5.05.05.05.0
FeaturesA2DP
EDR
HID
LE
A2DP
LE
A2DP
LE
A2DP
EDR
HID
LE

USB

The Universal Serial Bus (USB) is an industry standard that allows different electronic devices to exchange data.

Connector typeUSB Type-CUSB Type-CUSB Type-CUSB Type-C
Version2.02.02.02.0
FeaturesCharging
Host
Mass storage
On-The-Go
Charging
Host
Mass storage
On-The-Go
Charging
Mass storage
On-The-Go
Charging
Mass storage
On-The-Go

Headphone jack

The headphone jack is an audio phone connector, a.k.a. an audio jack. The most widely used one in mobile devices is the 3.5 mm headphone jack.

Headphone jackYesYesYesYes

Connectivity

Information about other important connectivity technologies supported by the devices.

ConnectivityComputer sync
OTA sync
Infrared
VoLTE
Computer sync
OTA sync
Tethering
DLNA
NFC
VoLTE
Computer sync
OTA sync
Tethering
VoLTE
Computer sync
OTA sync
Infrared
Tethering
NFC
VoLTE
ViLTE
---NXP-SN100T chip for NFC

Browser

A web browser is a software application for accessing, fetching, displaying and navigating through information on the World Wide Web.

BrowserHTML
HTML5
CSS 3
HTML
HTML5
CSS 3
HTML
HTML5
CSS 3
HTML
HTML5
CSS 3

Audio file formats/codecs

Mobile devices support various audio file formats and codecs, which respectively store and code/decode digital audio data.

Audio file formats/codecsAAC
AAC+
AMR
AMR-WB
eAAC+
FLAC
MIDI
MP3
OGG
WMA
WAV
AAC
AAC+
AMR
AMR-WB
aptX
aptX HD
eAAC+
FLAC
MIDI
MP3
OGG
WMA
WAV
LDAC
AAC
AMR
aptX
aptX HD
FLAC
M4A
MIDI
MP3
OGG
WMA
WAV
AAC
AAC+
AMR
AMR-WB
aptX
aptX HD
eAAC+
FLAC
MIDI
MP3
OGG
WMA
WAV
LDAC

Video file formats/codecs

Mobile devices support various video file formats and codecs, which respectively store and code/decode digital video data.

Video file formats/codecs3GPP
AVI
DivX
H.263
H.264
H.265
MKV
QuickTime
MP4
VC-1
WebM
WMV
Xvid
3GPP
AVI
DivX
H.263
H.264
H.265
MKV
MP4
VC-1
Xvid
3GPP
AVI
Flash Video
H.263
H.264
MKV
QuickTime
MP4
WMV
Xvid
3GPP
AVI
DivX
H.263
H.264
H.265
MKV
MP4
VC-1
Xvid

Battery

The batteries of mobile devices differ in capacity and technology. They provide the electrical charge needed for the functioning of the devices.

Capacity4030 mAh4000 mAh4000 mAh4500 mAh
TypeLi-PolymerLi-PolymerLi-IonLi-Ion
Charger output power5 V / 2 A
9 V / 2 A
5 V / 3 A
9 V / 2 A
12 V / 1.5 A
9 V / 2 A5 V / 3 A
9 V / 2 A
12 V / 1.5 A
Quick charge technologyQualcomm Quick Charge 3.0Qualcomm Quick Charge 4+mCharge 4.0MediaTek Pump Express 4.0, Qualcomm Quick Charge 3.0, Quick Charge 4+, USB Power Delivery 3.0
FeaturesFast charging
Non-removable
Fast charging
Non-removable
Fast charging
Non-removable
Fast charging
Non-removable

Specific Absorption Rate (SAR)

The SAR rating shows the amount of electromagnetic radiation absorbed by the human body when using a mobile device, expressed in W/kg.

Head SAR (EU)0.301 W/kg--0.997 W/kg
Body SAR (EU)1.097 W/kg--1.446 W/kg
Head SAR (USA)1.03 W/kg--1.15 W/kg
Body SAR (USA)1.07 W/kg--1.18 W/kg

Additional features

Some devices have additional features, different from the standard ones above, but equally important and worth mentioning.

Additional featuresM1906F9SI - SAR (Specific Absorption Rate) India: head - 0.527 W/kg; body - 0.722 W/kg
P2i nano-coating
M1903F10L - SAR (Specific Absorption Rate) India: head - 1.070 W/kg; body - 0.723 W/kg-Anti-splash coating
 Xiaomi Mi A3Xiaomi Redmi K20Meizu Note 9Xiaomi Redmi Note 8 Pro