Comparison between:
- Samsung Galaxy M21
- Xiaomi Mi Note 10 Lite
- Xiaomi Redmi Note 9 Pro
- Samsung Galaxy A31

Brand and model

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

Samsung Galaxy M21Xiaomi Mi Note 10 LiteXiaomi Redmi Note 9 ProSamsung Galaxy A31
Samsung Galaxy M21
Prices
Xiaomi Mi Note 10 Lite
Prices
Xiaomi Redmi Note 9 Pro
Prices
Samsung Galaxy A31
Prices
Model aliasSM-M215F
M215F
SM-M215FZBGINS
SM-M215FZBG
SM-M215F/DS
Mi Note10 LiteRedmi Note9 Pro
Red Rice Note 9 Pro
Red Rice Note9 Pro
SM-A315F

Design

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

Width75.1 mm
7.51 cm
0.246 ft
2.957 in
74.2 mm
7.42 cm
0.243 ft
2.921 in
76.68 mm
7.668 cm
0.252 ft
3.019 in
73.1 mm
7.31 cm
0.24 ft
2.878 in
Height159 mm
15.9 cm
0.522 ft
6.26 in
157.8 mm
15.78 cm
0.518 ft
6.213 in
165.75 mm
16.575 cm
0.544 ft
6.526 in
159.3 mm
15.93 cm
0.523 ft
6.272 in
Thickness8.9 mm
0.89 cm
0.029 ft
0.35 in
9.67 mm
0.967 cm
0.032 ft
0.381 in
8.8 mm
0.88 cm
0.029 ft
0.346 in
8.6 mm
0.86 cm
0.028 ft
0.339 in
Weight188 g
0.41 lbs
6.63 oz
208 g
0.46 lbs
7.34 oz
209 g
0.46 lbs
7.37 oz
185 g
0.41 lbs
6.53 oz
Volume106.27 cm³
6.45 in³
113.22 cm³
6.88 in³
111.85 cm³
6.79 in³
100.15 cm³
6.08 in³
ColorsMidnight Blue
Raven Black
Black
Purple
White
Glacier White
Interstellar Black
Tropical Green
Prism Crush Black
Prism Crush Blue
Prism Crush Red
Prism Crush White
Body materialsPlasticAluminium alloy
Glass
Glass
Plastic
Plastic

SIM card

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

SIM card typeNano-SIMNano-SIMNano-SIMNano-SIM
Number of SIM cards2222
FeaturesDual 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 (B5)
GSM 900 MHz (B8)
GSM 1800 MHz (B3)
GSM 1900 MHz (B2)
GSM 850 MHz (B5)
GSM 900 MHz (B8)
GSM 1800 MHz (B3)
GSM 1900 MHz (B2)
GSM 850 MHz (B5)
GSM 900 MHz (B8)
GSM 1800 MHz (B3)
GSM 1900 MHz (B2)
GSM 850 MHz (B5)
GSM 900 MHz (B8)
GSM 1800 MHz (B3)
GSM 1900 MHz (B2)
CDMA-CDMA 800 MHz (BC0)CDMA 800 MHz (BC0)-
W-CDMA-W-CDMA 850 MHz (B5)
W-CDMA 900 MHz (B8)
W-CDMA 1700 MHz (B4)
W-CDMA 1900 MHz (B2)
W-CDMA 2100 MHz (B1)
W-CDMA 850 MHz (B5)
W-CDMA 900 MHz (B8)
W-CDMA 1900 MHz (B2)
W-CDMA 2100 MHz (B1)
-
TD-SCDMA-TD-SCDMA 1880-1920 MHz
TD-SCDMA 2010-2025 MHz
--
UMTSUMTS 850 MHz (B5)
UMTS 900 MHz (B8)
UMTS 1900 MHz (B2)
UMTS 2100 MHz (B1)
--UMTS 850 MHz (B5)
UMTS 900 MHz (B8)
UMTS 1900 MHz (B2)
UMTS 2100 MHz (B1)
LTELTE-FDD 800 MHz (B20)
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-FDD 700 MHz (B12)
LTE-FDD 800 MHz (B20)
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 2300 MHz (B40)
LTE-TDD 2500 MHz (B41)
LTE-TDD 2600 MHz (B38)
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-FDD 850 MHz (B5)
LTE-FDD 900 MHz (B8)
LTE-FDD 1900 MHz (B25)
LTE-FDD 2100 MHz (B1)
LTE-FDD 2600 MHz (B7)

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
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
UMTS
EDGE
GPRS
HSPA+
LTE Cat 10

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 10MIUI V11 (Android 10)MIUI V11 (Android 10)Android 10
User interface (UI)One UI 2.0--One UI 2.0

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.

SoCSamsung Exynos 7 Octa 9611Qualcomm Snapdragon 730GQualcomm Snapdragon 720GMediaTek Helio G70
Process technology10 nm8 nm8 nm12 nm
CPU4x 2.3 GHz ARM Cortex-A73, 4x 1.7 GHz ARM Cortex-A532x 2.2 GHz Kryo 470, 6x 1.8 GHz Kryo 4702x 2.3 GHz Kryo 465, 6x 1.8 GHz Kryo 4652x 2.0 GHz Cortex-A75, 6x 1.7 GHz Cortex-A55
CPU bits64 bit64 bit64 bit64 bit
Instruction setARMv8-AARMv8ARMv8.2-AARMv8.2-A
CPU cores8888
CPU frequency2300 MHz2200 MHz2300 MHz2000 MHz
GPUARM Mali-G72 MP3Qualcomm Adreno 618Qualcomm Adreno 618ARM Mali-G52 2EEMC2
GPU cores3---
GPU frequency--750 MHz820 MHz
RAM capacity4 GB
6 GB
6 GB
8 GB
6 GB4 GB
6 GB
RAM typeLPDDR4XLPDDR4XLPDDR4XLPDDR4X
RAM channelsDouble channelDouble channelDouble channelDouble channel
RAM frequency-1866 MHz2133 MHz-
-Game Turbo 2.0--

Storage

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

Storage64 GB
128 GB
64 GB
128 GB
64 GB
128 GB
64 GB
128 GB
--UFS 2.1eMMC 5.1

Memory cards

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

TypesmicroSD
microSDHC
microSDXC
-microSD
microSDHC
microSDXC
microSD
microSDHC
microSDXC
UFS 2.1---

Display

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

Type/technologySuper AMOLEDAMOLEDIPSSuper AMOLED
Diagonal size6.4 in
162.56 mm
16.26 cm
6.47 in
164.34 mm
16.43 cm
6.67 in
169.42 mm
16.94 cm
6.4 in
162.56 mm
16.26 cm
Width2.68 in
68.12 mm
6.81 cm
2.71 in
68.87 mm
6.89 cm
2.74 in
69.52 mm
6.95 cm
2.63 in
66.71 mm
6.67 cm
Height5.81 in
147.6 mm
14.76 cm
5.87 in
149.21 mm
14.92 cm
6.08 in
154.5 mm
15.45 cm
5.84 in
148.24 mm
14.82 cm
Aspect ratio2.167:12.167:12.222:12.222:1
Resolution1080 x 2340 pixels1080 x 2340 pixels1080 x 2400 pixels1080 x 2400 pixels
Pixel density403 ppi
158 ppcm
398 ppi
156 ppcm
395 ppi
155 ppcm
411 ppi
161 ppcm
Color depth24 bit
16777216 colors
24 bit
16777216 colors
24 bit
16777216 colors
24 bit
16777216 colors
Display area84.48 %88.05 %84.78 %85.2 %
Other featuresCapacitive
Multi-touch
Capacitive
Multi-touch
Scratch resistant
Capacitive
Scratch resistant
Capacitive
Multi-touch
Scratch resistant
Infinity U Display
2.5D curved glass screen
Corning Gorilla Glass 3
Peak brightness - 420 cd/m²
78960:1
3D curved glass screen
TÜV Rheinland Low Light Blue Certification
Corning Gorilla Glass 5
400000:1 contrast ratio
430 cd/m²
Peak brightness - 600 cd/m²
103.8% NTSC
DC dimming
HDR10
2.5D curved glass screen
Corning Gorilla Glass 5
Oleophobic coating
TÜV Rheinland Low Blue Light Certification
1500:1 contrast ratio
450 cd/m² typical brightness
84% NTSC
Infinity-U Display
2.5D curved glass screen

Sensors

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

SensorsProximity
Accelerometer
Compass
Gyroscope
Geomagnetic
Fingerprint
Virtual Light Sensor
Proximity
Light
Accelerometer
Compass
Gyroscope
Fingerprint
Proximity
Light
Accelerometer
Compass
Gyroscope
Fingerprint
Proximity
Light
Accelerometer
Compass
Gyroscope
Fingerprint
Hall
-In-display fingerprint sensorSide-mounted fingerprint sensorIn-display fingerprint sensor

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 model-Sony IMX686--
Sensor typeCMOS BSI-CMOS-
Sensor format1/2"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
Aperturef/2f/1.69f/1.79f/2
Focal length and 35 mm equivalent26 mm *(35 mm / full frame)---
Number of lenses-66-
Flash typeLEDDual LEDLEDLED
Image resolution8000 x 6000 pixels
48 MP
9280 x 6944 pixels
64.44 MP
64 MP8000 x 6000 pixels
48 MP
Video resolution3840 x 2160 pixels
8.29 MP
3840 x 2160 pixels
8.29 MP
3840 x 2160 pixels
8.29 MP
1920 x 1080 pixels
2.07 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 autofocus
Continuous shooting
Digital zoom
Digital image stabilization
Optical 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)
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)
Autofocus
Continuous shooting
Digital zoom
Geotagging
Panorama
HDR
Touch focus
Face detection
White balance settings
ISO settings
Exposure compensation
Self-timer
Scene mode
Secondary rear camera - 5 MP (depth)
Aperture size - f/2.2 (#2)
Third rear camera - 8 MP (ultra-wide angle)
Sensor size - 1/4" (#3)
Pixel size - 1.12 µm (#3)
Aperture size - f/2.2 (#3)
Angle of view - 123° (#3)
Pixel size - 1.6 μm (4-in-1 pixel binning)
Sensor type - ISOCELL PLUS
Super Phase Detection
Secondary rear camera - 8 MP (ultra-wide-angle)
Third rear camera - 2 MP (macro)
Aperture size - f/2.4 (#3)
Fourth rear camera - 2 MP (depth-sensing)
Aperture size - f/2.4 (#4)
Sony IMX582 versions also available
Pixel size - 1.6 μm (4-in-1 pixel binning)
Secondary rear camera - 8 MP (ultra-wide)
Sensor model - OmniVision OV8856 (#2)
GalaxyCore GC8034 version also available(#2)
Sensor size - 1/4" (#2)
Pixel size - 1.12 μm (#2)
Aperture size - f/2.2 (#2)
Angle of view - 118° (#2)
Focal length (35 mm equivalent) - 13 mm (#2)
Third rear camera - 2MP (depth-sensing)
Sensor model - GalaxyCore GC02M1 (#3)
Sensor size - 1/5" (#3)
Pixel size - 1.75 μm (#3)
Aperture size - f/2.4 (#3)
Fourth rear camera - 5MP (macro)
Sensor model - Samsung S5K5E9 (#4)
Pixel size - 1.12 μm (#4)
2 cm shooting distance (#4)
Secondary rear camera - 8 MP (ultra-wide)
Aperture size - f/2.2 (#2)
Third rear camera - 5 MP (depth-sensing)
Aperture size - f/2.4 (#3)
Fourth rear camera - 5 MP (macro)
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 model--OmniVision OV16A1Q-
Sensor typeCMOS BSI---
Sensor format-1/3.06"--
Pixel size-1 µm
0.001000 mm
1 µm
0.001000 mm
-
Aperturef/2f/2.48f/2f/2.2
Focal length and 35 mm equivalent26 mm *(35 mm / full frame)---
Image resolution20 MP4608 x 3456 pixels
15.93 MP
4608 x 3456 pixels
15.93 MP
20 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 unlockFace unlockFace unlock
HDR
Face detection
Face unlock
HDR

Audio

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

SpeakerLoudspeaker
Earpiece
Loudspeaker
Earpiece
Loudspeaker
Earpiece
Loudspeaker
Earpiece
Dolby Atmos for stereo headsets
Widevine L1 Certification
Hi-Res Audio
Smart PA
1216 super linear speaker
Smart PA
Dual microphones with active noise cancellation
1216 linear speaker
Z-axis linear motor
-

Radio

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

RadioYesYesYesYes
RDS---

Tracking/Positioning

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

Tracking/PositioningGPS
A-GPS
GLONASS
BeiDou
GPS
A-GPS
GLONASS
Galileo
GPS
A-GPS
GLONASS
Galileo
Beidou
NavIC
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-Fi802.11b
802.11g
802.11n
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
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
--2x2 MU-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
LE
A2DP
EDR
HID
LE
A2DP
EDR
HID
LE
A2DP
AVRCP
DIP
HFP
HID
HSP
MAP
OPP
PAN
PBAP
HOGP

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
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
Tethering
Computer sync
OTA sync
Infrared
NFC
VoLTE
Computer sync
OTA sync
Infrared
Tethering
NFC
VoLTE
ViLTE
VoWiFi
Computer sync
OTA sync
Tethering
NFC
VoLTE
---Availability of Samsung Pay Service (NFC or MST) may vary by country

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
AMR
AMR-WB
eAAC+
FLAC
M4A
MIDI
MP3
OGG
WMA
WAV
AAC
AAC+
AMR
AMR-WB
aptX
aptX HD
eAAC+
FLAC
MIDI
MP3
OGG
WMA
WAV
aptX Adaptive
LDAC
AAC
AAC+
AMR
AMR-WB
aptX
aptX HD
eAAC+
FLAC
MIDI
MP3
OGG
WMA
WAV
LDAC
AAC
AMR
AMR-WB
eAAC+
FLAC
M4A
MIDI
MP3
OGG
WMA
WAV

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
3GPP2
AVI
Flash Video
H.263
H.264
H.265
MKV
MP4
VC-1
VP8
VP9
WebM
WMV
WMV7
WMV8
Xvid
3GPP
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
3GPP2
AVI
Flash Video
H.263
H.264
H.265
MKV
MP4
VC-1
VP8
VP9
WebM
WMV
WMV7
WMV8
Xvid

Battery

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

Capacity6000 mAh5260 mAh5020 mAh5000 mAh
TypeLi-IonLi-PolymerLi-IonLi-Ion
Charger output power5 V / 3 A5 V / 6 A5 V / 6 A5 V / 2 A
9 V / 1.67 A
FeaturesFast charging
Non-removable
Fast charging
Non-removable
Fast charging
Non-removable
Fast charging
Non-removable
--33W in-box charger-

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)0.492 W/kg1.107 W/kg-0.488 W/kg
Body SAR (EU)1.13 W/kg1.392 W/kg-1.68 W/kg
Head SAR (USA)-1.19 W/kg--
Body SAR (USA)-1.18 W/kg--

Additional features

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

Additional featuresSAR (Specific Absorption Rate) India: head - 0.468 W/kg-P2i splash-proof nano-coating-
 Samsung Galaxy M21Xiaomi Mi Note 10 LiteXiaomi Redmi Note 9 ProSamsung Galaxy A31