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Samsung Galaxy M31s vs Samsung Galaxy M21 vs Samsung Galaxy M51

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

Comparison mode:

Display

Size:

6.5 inches
6.4 inches
6.7 inches

Resolution:

2400 x 1080 pixels, 20:9 ratio, 405 PPI
2340 x 1080 pixels, 19.5:9 ratio, 403 PPI
2340 x 1080 pixels, 20:9 ratio, 385 PPI

Technology:

Super AMOLED
Super AMOLED
Super AMOLED Plus

Screen-to-body:

86.06 %
84.11 %
88.27 %

Peak brightness:

420 cd/m2 (nit)

Features:

Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor
Scratch-resistant glass (Corning Gorilla Glass 3), Proximity sensor
Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor

Hardware

System chip:

Samsung Exynos 9611 (10 nm)
Exynos 9611 (10 nm)
Qualcomm Snapdragon 730 SM7150-AA (8 nm)

Processor:

Octa-core, 4x 2.3GHz Cortex-A73 + 4x 1.7GHz Cortex-A53, 64-bit
Octa-core, 4x 2.3GHz Cortex-A73 + 4x 1.7GHz Cortex-A53, 64-bit
Octa-core, 2x 2.2GHz Kryo 470 + 6x 1.8GHz Kryo 470, 64-bit

GPU:

Mali-G72 MP3
Mali-G72 MP3
Adreno 618

RAM:

6GB LPDDR4
4GB LPDDR4
6GB LPDDR4

Internal storage:

128GB (UFS 2.1), available to use: 106.4 GB
64GB, available to use: 49 GB
128GB, available to use: 106 GB

Storage expansion:

microSDXC up to 512 GB
microSDXC up to 512 GB
microSDXC up to 512 GB

Device type:

Smartphone
Smartphone
Smartphone

OS:

Android (11, 10), Samsung One UI
Android (11, 10), Samsung One UI
Android (10), Samsung One UI

Battery

Capacity:

6000 mAh
6000 mAh
7000 mAh

Type:

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

Charging:

Fast charging, Reverse charging
Fast charging
Fast charging, Reverse charging

Max charge speed:

Wired: 25.0W
Wired: 25.0W

Camera

Rear:

Quad camera
Triple camera
Quad camera

Main camera:

64 MP (PDAF)
48 MP (PDAF)
64 MP (PDAF)

Specifications:

Aperture size: F1.8; Focal length: 26 mm; Sensor size: 1/1.7"; Pixel size: 0.8 μm
Aperture size: F2.0; Focal length: 26 mm; Sensor size: 1/2"; Pixel size: 0.8 μm
Aperture size: F1.8; Focal length: 26 mm; Sensor size: 1/1.76"; Pixel size: 0.8 μm

Second camera:

12 MP (Ultra-wide)
8 MP (Ultra-wide)
12 MP (Ultra-wide)

Specifications:

Aperture size: F2.2
Aperture size: F2.2; Focal Length: 12 mm; Sensor size: 1/4"; Pixel size: 1.12 μm
Aperture size: F2.2

Third camera:

5 MP (Macro)
5 MP (Depth information)
5 MP (Macro)

Specifications:

Aperture size: F2.4
Aperture size: F2.2
Aperture size: F2.4

Fourth camera:

5 MP (Depth information)
5 MP (Depth information)

Specifications:

Aperture size: F2.4
Aperture size: F2.4

Video recording:

3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD) (120 fps), 1280x720 (HD) (480 fps)
3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD), 1280x720 (HD) (240 fps)
3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD)

Features:

Hyperlapse, EIS
EIS

Front:

32 MP
20 MP (HDR)
32 MP (HDR)

Video capture:

3840x2160 (4K UHD) (30 fps)
1920x1080 (Full HD)
1920x1080 (Full HD)

Design

Dimensions:

6.27 x 2.93 x 0.37 inches (159.3 x 74.4 x 9.3 mm)
6.26 x 2.96 x 0.35 inches (159.0 x 75.1 x 8.9 mm)
6.45 x 3.00 x 0.37 inches (163.9 x 76.3 x 9.5 mm)

Weight:

7.16 oz (203.0 g)
6.63 oz (188.0 g)
7.51 oz (213.0 g)

Materials:

Back: Plastic; Frame: Plastic
Back: Plastic; Frame: Plastic

Biometrics:

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

Keys:

Right: Volume control, Lock/Unlock key
Right: Volume control, Lock/Unlock key
Right: Volume control, Lock/Unlock key

Colors:

Mirage black, Mirage blue
Midnight blue, Raven black
Black, White

Cellular

LTE (FDD):

Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 12(700 a), 17(700 b), 20(800 DD), 26(850+), 28(700 APT), 66(AWS-3)
Bands 1(2100), 3(1800), 5(850), 7(2600), 8(900), 20(800 DD)
Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 12(700 a), 17(700 b), 20(800 DD), 26(850+), 28(700 APT), 66(AWS-3)

LTE (TDD):

Bands 38(2600), 40(2300), 41(2600+)
Bands 38(2600), 40(2300), 41(2600+)
Bands 38(2600), 40(2300), 41(2600+)

UMTS:

Bands 1(2100), 2(1900), 4(1700/2100), 5(850), 8(900)
Bands 1(2100), 2(1900), 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, HSUPA 5.76 Mbit/s
LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s, UMTS

Dual SIM:

Yes
Yes
Yes

SIM type:

Nano SIM
Nano SIM
Nano SIM

Multimedia

Headphones:

3.5mm jack
3.5mm jack
3.5mm jack

Speakers:

Earpiece, Loudspeaker
Earpiece, Loudspeaker
Earpiece, Loudspeaker

Features:

Dolby Atmos

Screen mirroring:

Wireless screen share
Wireless screen share
Wireless screen share

Radio:

FM
FM
FM, Stereo, RDS

Additional microphone(s):

for Noise cancellation

Connectivity & Features

Bluetooth:

5.0
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, dual-band; Wi-Fi Direct, Hotspot
802.11 a, b, g, n, ac, dual-band; Wi-Fi Direct, Hotspot

USB:

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

Features:

Charging, OTG
Charging
Charging

Location:

GPS, A-GPS, 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
Accelerometer, Gyroscope, Compass

Other:

NFC
NFC

Buyers information

Price:

€ 310
€ 360

User Manual:

This is the official Samsu​ng Galaxy M31s User Guide in English provided from the manufacturer.

In The Box:

This is the official Samsu​ng Galaxy M21 User Guide in English provided from the manufacturer.

Availability

Officially announced:

Jul 30, 2020
Mar 18, 2020
Aug 31, 2020
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