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Samsung Galaxy M31s vs Samsung Galaxy M21 vs Xiaomi Mi 9 Pro

Key Feature Comparison

6.9

Samsung Galaxy M31s

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6.8

Samsung Galaxy M21

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6.7

Xiaomi Mi 9 Pro

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At a Glance

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Octa core (2.3 GHz, Quad core, Cortex A73 + 1.7 GHz, Quad core, Cortex A53)

Samsung Exynos 9 Octa 9611, Mali-G72 MP3

Octa core (2.3 GHz, Quad core, Cortex A73 + 1.7 GHz, Quad core, Cortex A53)

Samsung Exynos 9 Octa 9611, Mali-G72 MP3

Octa core (2.96 GHz, Single core, Kryo 485 + 2.42 GHz, Tri core, Kryo 485 + 1.8 GHz, Quad core, Kryo 485)

Qualcomm Snapdragon 855 Plus, Adreno 640

6000 mAh

Li-ion, Fast, 25W

6000 mAh

Li-ion, Fast, 15W

4000 mAh

Li-ion, Quick, v4.0

6.5 inches

405 ppi, FHD

6.4 inches

403 ppi, FHD

6.39 inches

395 ppi, FHD

Quad, 64MP + 12MP + 5MP + 5MP

3840x2160 @ 30 fps

Triple, 48MP + 8MP + 5MP

3840x2160 @ 30 fps, 1920x1080 @ 30 fps

Triple, 48MP + 12MP + 16MP

4G

Dual SIM, GSM+GSM

4G

Dual SIM, GSM+GSM

5G

Dual SIM, GSM+GSM

Detailed Specs

Screen Size

6.5 inches
6.4 inches
6.39 inches

Screen Type

Super AMOLED
Super AMOLED
Super AMOLED

Screen Resolution

1080 x 2400 pixels
1080 x 2340 pixels
1080 x 2280 pixels

Pixel Density

405 ppi
403 ppi
395 ppi

Aspect Ratio

20:09
19.5:9
19.5:9

Screen Protection

Gorilla Glass 3
Gorilla Glass 3
Gorilla Glass 6

Screen to Body Ratio

91%
91%
86.48%

Screen Design

Punch hole
Waterdrop notch
Waterdrop notch

Screen Refresh Rate

60 Hz
-
-

Screen Quality

FHD
FHD
FHD

Peak Brightness

420 nits
420 nits
-

Phone Variants

8GB 128GB, 6GB 128GB
4GB 64GB, 6GB 128GB
8GB 128GB

Expandable Storage

Yes
Yes
No

RAM Type

LPDDR4X
LPDDR4X
LPDDR4X

Storage Type

UFS 2.1
UFS 2.1
-

Expandable Storage Capacity

Yes, 512 GB
Yes, 512 GB
-

OTG Support

-
Yes
-

Sensors

Light sensor, Proximity sensor, Accelerometer, Compass, Gyroscope
Light sensor, Proximity sensor, Accelerometer, Gyroscope
Light sensor, Proximity sensor, Accelerometer, Compass, Gyroscope

Operating System

Android v10 (Q)
Android v10 (Q)
Android v9.0 (Pie)

GPU

Mali-G72 MP3
Mali-G72 MP3
Adreno 640

Chipset

Samsung Exynos 9 Octa 9611
Samsung Exynos 9 Octa 9611
Qualcomm Snapdragon 855 Plus

CPU

Octa core (2.3 GHz, Quad core, Cortex A73 + 1.7 GHz, Quad core, Cortex A53)
Octa core (2.3 GHz, Quad core, Cortex A73 + 1.7 GHz, Quad core, Cortex A53)
Octa core (2.96 GHz, Single core, Kryo 485 + 2.42 GHz, Tri core, Kryo 485 + 1.8 GHz, Quad core, Kryo 485)

Custom User Interface

Samsung One UI
Samsung One UI
MIUI

Clock Speed

2.3 GHz
2.3 GHz
2.96 GHz

Architecture

64 bit
64 bit
64 bit

Process Technology

10 nm
10 nm
-

Battery Capacity

6000 mAh
6000 mAh
4000 mAh

Battery Removable

No
No
No

Battery Type

Li-ion
Li-ion
Li-ion

Charger Type

Fast, 25W
Fast, 15W
Quick, v4.0

USB Type-C

Yes
Yes
Yes

Fast Charging

Yes
Yes
Yes

Announced On

30-Jul-20
18-Mar-20
5-Sep-19

Market Status

Available
Available
Launched Globally

Brand

Samsung
Samsung
Xiaomi

Model Number

SM-M317FZBDINS
SM-M215FZKDINS
-

Price Status

Confirmed
Confirmed
Expected

Price

Rs. 18,499
Rs. 13,499
Rs. 36,890

GPS

Yes A-GPS, Glonass
Yes A-GPS, Glonass
Yes A-GPS, Glonass

Audio Features

Dolby Atmos
Dolby Atmos
Active noise cancellation with dedicated mic

NFC

No
No
Yes

Network Support

4G
4G
5G

Bluetooth

Yes
Yes
Yes

3.5mm Audio Jack

Yes
Yes
No

SIM Size

SIM1: Nano, SIM2: Nano
SIM1: Nano, SIM2: Nano
SIM1: Nano, SIM2: Nano

Wi-Fi

Yes, Wi-Fi 802.11, ac/b/g/n/n 5GHz
Yes, Wi-Fi 802.11, ac/b/g/n/n 5GHz
Yes, Wi-Fi 802.11, a/ac/b/g/n, MIMO

Bluetooth Type

v5.0
v5.0
v5.0

Audio Jack

3.5 mm
3.5 mm
USB Type-C

SIM Slot(s)

Dual SIM, GSM+GSM
Dual SIM, GSM+GSM
Dual SIM, GSM+GSM

eSIM

No
No
No

Wi-Fi Features

Wi-Fi Direct, Mobile Hotspot
Wi-Fi Direct, Mobile Hotspot
Mobile Hotspot

VoLTE

Yes
Yes
Yes

SIM 1 Bands

4G Bands: TD-LTE 2600(band 38) / 2300(band 40) / 2500(band 41), FD-LTE 2100(band 1) / 1800(band 3) / 2600(band 7) / 900(band 8) / 700(band 28) / 1900(band 2) / 1700(band 4) / 850(band 5) / 700(band 17) / 800(band 20) / 850(band 26), 3G Bands: UMTS 19...
4G Bands: TD-LTE 2600(band 38) / 2300(band 40) / 2500(band 41), FD-LTE 2100(band 1) / 1800(band 3) / 2600(band 7) / 900(band 8) / 850(band 5) / 800(band 20), 3G Bands: UMTS 1900 / 2100 / 850 / 900 MHz, 2G Bands: GSM 1800 / 1900 / 850 / 900 MHz, GPRS:...
4G Bands: TD-LTE 2600(band 38) / 2300(band 40) / 2500(band 41) / 2100(band 34) / 1900(band 39), FD-LTE 2100(band 1) / 1800(band 3) / 2600(band 7) / 900(band 8) / 1900(band 2) / 1700(band 4) / 850(band 5) / 700(band 17), 3G Bands: UMTS 1900 / 2100 / 8...

SIM 2 Bands

4G Bands: TD-LTE 2600(band 38) / 2300(band 40) / 2500(band 41), FD-LTE 2100(band 1) / 1800(band 3) / 2600(band 7) / 900(band 8) / 700(band 28) / 1900(band 2) / 1700(band 4) / 850(band 5) / 700(band 17) / 800(band 20) / 850(band 26), 3G Bands: UMTS 19...
4G Bands: TD-LTE 2600(band 38) / 2300(band 40) / 2500(band 41), FD-LTE 2100(band 1) / 1800(band 3) / 2600(band 7) / 900(band 8) / 850(band 5) / 800(band 20), 3G Bands: UMTS 1900 / 2100 / 850 / 900 MHz, 2G Bands: GSM 1800 / 1900 / 850 / 900 MHz, GPRS:...
4G Bands: TD-LTE 2600(band 38) / 2300(band 40) / 2500(band 41) / 2100(band 34) / 1900(band 39), FD-LTE 2100(band 1) / 1800(band 3) / 2600(band 7) / 900(band 8) / 1900(band 2) / 1700(band 4) / 850(band 5) / 700(band 17), 3G Bands: UMTS 1900 / 2100 / 8...

Front Video Recording

3840x2160 @ 30 fps
1920x1080 @ 30 fps
1080p30fps

Front Camera Features

HDR
HDR
HDR

Front Camera Setup

Single, 32MP
Single, 20MP
Single, 20MP

Front Camera 1 Resolution

32 MP
20 MP
20 MP

Front Camera 1 Type

f/2.2 Primary Camera
f/2.2 Primary Camera
f/2.0 Primary Camera

Front Camera 1 Lens

26 mm focal length, 2.8" sensor size, 0.8 micrometre pixel size
26 mm focal length
0.9 micrometre pixel size

Front Sensor

Exmor RS
CMOS
-

Front Aperture

f/2.2
f/2.2
f/2.0

Front Flash

No
No
Yes, Screen flash

Weight

203 grams
188 grams
196 grams

Colors

Mirage Black, Mirage Blue
Midnight Blue, Raven Black
Dream White, Titanium Black

Build

Back: Plastic
Back: Plastic
Back glass (Gorilla Glass 6), aluminum frame (7000 series)

Dimensions

159.3 x 74.4 x 9.3 mm
159 x 75.1 x 8.9 mm
157.2 x 74.6 x 8.9 mm

SAR Value

Head: 1.38 W/kg
Head: 0.468 W/kg
-

OIS

No
No
Yes

Rear Flash

Yes, LED Flash
Yes, LED Flash
Yes, LED Flash

Rear Video Recording

3840x2160 @ 30 fps
3840x2160 @ 30 fps, 1920x1080 @ 30 fps
-

Rear Camera Features

10 x Digital Zoom, Auto Flash, Face detection, Touch to focus
4 x Digital Zoom, Auto Flash, Face detection, Touch to focus
Digital Zoom, Auto Flash, Face detection, Touch to focus

Rear Camera Setup

Quad, 64MP + 12MP + 5MP + 5MP
Triple, 48MP + 8MP + 5MP
Triple, 48MP + 12MP + 16MP

Rear Camera 1 Resolution

64 MP
48 MP
48 MP

Rear Camera 1 Type

f/1.8 (upto 10x Digital Zoom), Wide Angle Primary Camera
f/2.0 (upto 4x Digital Zoom) Primary Camera
f/1.75 Primary Camera

Rear Camera 1 Lens

26 mm focal length, 1.7" sensor size, 0.8 micrometre pixel size
26 mm focal length, 2" sensor size, 0.8 micrometre pixel size
2" sensor size, 0.8 micrometre pixel size

Rear Camera 2 Resolution

12 MP
8 MP
12 MP

Rear Camera 2 Type

f/2.2, Wide Angle, Ultra-Wide Angle Camera
f/2.2, Wide Angle, Ultra-Wide Angle Camera
f/2.2 Telephoto Camera

Rear Camera 3 Resolution

5 MP
5 MP
16 MP

Rear Camera 3 Type

f/2.4, Macro Camera
f/2.2, Depth Camera
f/2.2, Wide Angle, Ultra-Wide Angle Camera

Rear Camera 4 Resolution

5 MP
-
-

Rear Camera 4 Type

f/2.4, Depth Camera
-
-

Rear Sensor

Exmor-RS CMOS Sensor
CMOS image sensor
Exmor-RS CMOS Sensor

Rear Aperture

f/1.8
f/2.0
f/1.75

Rear Camera 2 Lens

-
12 mm focal length, 4.0" sensor size, 1.12 micrometre pixel size
3.6" sensor size, 1 micrometre pixel size

Fingerprint Scanner

Yes
Yes
Yes

Fingerprint Scanner Position

Side
Rear
On-Screen

Face Unlock

Yes
Yes
Yes

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