Samsung Galaxy M31 Specs, review, opinions, comparisons

Samsung Galaxy M31 Specs, review, opinions, comparisons
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Samsung Galaxy M31 Top Specs

  • Release Date: 2020, February 25
  • Dimensions: 159.2 x 75.1 x 8.9 mm
  • Weight: 191 g
  • Screen: 6.4", Super AMOLED
  • Main Camera: Triple, 64 MP
  • Selfi Camera: Single, 32 MP
  • Memory: 64GB 6GB RAM, 128GB 6GB RAM
  • CPU:
  • Battery: 6000 mAh
  • Sensors: Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass

For a full detailed phone specs keep reading the table with technical specifications, check video review, read opinions and compare with other models.

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Technical specifications

General specs
Brand and model Samsung Galaxy M31
Release date 2020, February 25
Dimensions (HxWxD) 159.2 x 75.1 x 8.9 mm | 6.27 x 2.96 x 0.35 in
Weight 191 g | 6.74 oz
Body build Glass front (Gorilla Glass 3), plastic back, plastic frame
Colors Ocean Blue, Space Black, Red
Battery 6000 mAh,  Non-removable Li-Po
Approximate price200 EUR
Technology Super AMOLED
Touchscreen capacitive touchscreen
Display colors 16M
Screen size 6.4" inc
Screen area 100.5 cm2
Screen format 19.5:9 (height:width)
Screen to body ratio84.1%
Screen resolution 1080 x 2340 px
PPI /points per inch/ 403 PPI
Screen protection Corning Gorilla Glass 3
Camera and Video
Rear camera, main 64 MP, Triple
Camera specs
-64 MP, f/1.8, 26mm (wide), 1/1.72", 0.8µm, PDAF
-8 MP, f/2.2, 12mm (ultrawide), 1/4.0", 1.12µm
-5 MP, f/2.4, 25mm (macro), 1/5.0", 1.12µm
-5 MP, f/2.2, (depth)
Functions LED flash, panorama, HDR
Video 2160p@30fps, 1080p@30fps, gyro-EIS
Front camera, selfie 32 MP, Single
Specifications 32 MP, f/2.0, 26mm (wide), 1/2.8'', 0.8µm
Functions HDR
Video 2160p@30fps, 1080p@30fps
Operating system OS Android 10.0; One UI 2.0
Chipset - Exynos 9611 (10nm)
Processor CPU
- Octa-core (4x2.3 GHz Cortex-A73 & 4x1.7 GHz Cortex-A53)
Graphics processor GPU - Mali-G72 MP3
External memory microSDXC (dedicated slot)
Internal memory 64GB 6GB RAM, 128GB 6GB RAM
Antutu 8 score194554
GeekBench 5 Single Core323
GeekBench 5 Multi-Core1211
Communication and Connectivity
SIM card Dual SIM (Nano-SIM, dual stand-by)
Network GSM / HSPA / LTE
Show all network frequencies:
Edge Yes
Wi-Fi Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot
NFC Yes (market/region dependent)
USB 2.0, Type-C 1.0 reversible connector
Bluetooth 5.0, A2DP, LE
Harmful irradiation
SAR - 0.52 W/kg (head) 0.69 W/kg (body)
SAR EU - 0.52 W/kg (head) 0.69 W/kg (body)
Music and Audio
Radio FM radio, RDS, recording
Headphone jack Yes
Other features
- Sensors - Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass
- Fast battery charging 15W
- Versions: SM-M315F/DS

Samsung Galaxy M31 Video review - click to play

Samsung Galaxy M31 Review

The Samsung Galaxy M31 is the next generation smartphone after the Galaxy M30 and M30s. It has all the merits of the M series. In certain features, it offers something more. There are several reasons why it is worth the interest. 


In the design of the Samsung Galaxy M31 we see a focus on simplicity and laconicity. The body is made of plastic with a glossy finish. The colours are several: black, blue and red. It is recommended to equip the Samsung Galaxy M31 with a case to preserve its flawless appearance for longer. 

The dimensions of the smartphone are 159.2 x 75.1 x 8.9 at 191 grams weight. The edges of the case are slightly rounded. Thanks to this, you will be happy to hold the device in your hand. 


The screen of the Samsung Galaxy M31 has a diagonal of 6.4 inches, a resolution of 2340 x 1080. The aspect ratio is 19.5:9. The pixel density per inch is decent - 394. The screen is implemented on Super AMOLED technology. The display is beautiful, the black color is characteristically deep, there is a good brightness margin. As for the color rendering, it, as in most Samsung phones, and here you can adjust it in the "Screen Mode" menu. There are two available - saturated and natural colours. 

As a consumer, you'll want to know that the Samsung Galaxy M31 offers a night mode, brightness adjustment, and an Always On Display feature.


At the core of the Samsung Galaxy M31 lies an 8-core Exynos 9611, consisting of 4x2.3 GHz + 4x1.7 GHz. The graphics core is a Mali-G72 MP3. The smartphone is available in 6 GB RAM and 128 GB flash memory modification with an option to expand up to 512 GB with a microSD memory card. If we have to draw a parallel with the Samsung Galaxy M30s, here the RAM is 2 GB more. This will definitely be to the advantage of the Samsung Galaxy M31's performance. 

The combination of a mid-range chipset with a not bad stock of RAM guarantee this model a decent performance. It performs beautifully in everyday tasks including mobile gaming. 


The Galaxy M31 is equipped with a quad camera with flash. The flagship sensor is 64 MP with f/1.8 aperture and works with Quad Pixel technology. Here, 4 pixels are combined into one to produce more light. This brings the actual resolution down to 16 MP. Of course, you can also shoot with all 64 MP. Apart from the main sensor, the Samsung Galaxy M31 has an 8 MP wide-angle sensor with f/2.2, a depth sensor - 5 MP, f/2.2 and a macro sensor - 5 MP, f/2.4. 

The selfie camera is graced with a 32-megapixel module and can shoot video up to 4K resolution. 

Autonomous operation

The battery capacity is 6000 mAh Samsung Galaxy M31. We can define it as a key trump of this model. It guarantees full autonomous work up to 1.5-2 days. Of course, if you get into more mobile games and use other heavy applications, you will need to recharge earlier. Samsung has provided fast charging technology, and the charger goes in the package. 


The Samsung Galaxy M31 is an excellent smartphone with well-rounded capabilities, nice performance, a quality display, and satisfactory autonomy. As a con, we can point out the casing, which will easily leave fingerprints on it if you don't wear a case. 

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Frequently Asked Questions

The base approximate price of the Samsung Galaxy M31 was around 200 EUR after it was officially announced. At this point, the price may be lower.
The official release date is 2020, February 25.
The weight of the Samsung Galaxy M31 is 191 g.
The screen size of the Samsung Galaxy M31 is 6.4" inches.
The size of the Samsung Galaxy M31 is 159.2 x 75.1 x 8.9 mm (HxWxD).
No, it does not support 5G
No, it is not waterproof.
Yes, it supports fast charging.
No, it does not support wireless charging.
Yes, it supports the services of Google Play store, gmail, youtube, etc.
There is Triple main camera and Single selfi camera.
To turn on the phone, press and hold the power key until the logo appears on the screen, then release the key. If the phone does not turn on after a few seconds, connect the charger and try again in a minute.
To turn off the phone, press and hold the power button until the power icon appears, then tap the power icon.
To restart the phone, press and hold the volume down key and the power key at the same time until the logo appears on the screen, then release them. This may take up to 30 seconds.
To take a screenshot, press and release the volume down button and the power button at the same time. A thumbnail of the screenshot will appear immediately after that.