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Samsung Galaxy M21 vs Galaxy M31: What’s the difference?


Samsung’s value-oriented Galaxy M-series keeps on growing in an attempt to combat the emerging brands from China.

Two months in the year 2020, Samsung has already released two new devices in this line-up. The first one is the Samsung Galaxy M31.


Just like its predecessors, the Galaxy M31 packs a lot of big features — all crammed in a price tag that’s cheaper than most Galaxy A devices.

That’s the same traits that the also new Samsung Galaxy M21 has. The two have large screens, capable processors, and enormous batteries. Those are the key things that people are looking for on a smartphone.


Obviously, the more expensive Galaxy M31 will have better features. But here in our Samsung Galaxy M21 versus Galaxy M31 specifications and features comparison, we want to see how different these two actually are. And, if getting the more expensive model is actually better, or if cheaping out makes more sense.

Samsung Galaxy M21Samsung Galaxy M31
Operating SystemAndroid 10
OneUI 2.0
Android 10
OneUI 2.0
Dual Standby
Dual SIM
Dual Standby
Display6.4-inch FHD+ Super AMOLED
2340 x 1080 pixel resolution
Corning Gorilla Glass 3
6.4-inch FHD+ Super AMOLED
2340 x 1080 pixel resolution
Corning Gorilla Glass 3
Processor2.3GHz Exynos 9611 octa-core2.3GHz Exynos 9611 octa-core
GPUMali-G72 MP3Mali-G72 MP3
expandable via microSD up to 512GB
expandable via microSD up to 512GB
Front Camera20-megapixel32-megapixel
Rear Camera48-megapixel (f/1.9)
8-megapixel (ultra-wide, f/2.2)
5-megapixel (depth sensor, f/2.2)
LED flash
AI Scene Detection
64-megapixel (f/1.8)
8-megapixel (ultra-wide)
5-megapixel (macro)
5-megapixel (depth sensor)
LED flash
AI Scene Detection
AudioHeadphone jack
Single loudspeaker
Widevine L1 certification
Headphone jack
Single loudspeaker
Widevine L1 certification
SecurityRear-mounted fingerprint scanner
Face unlock
Rear-mounted fingerprint scanner
Face unlock
Connectivity4G LTE, VoLTE
WiFi 802.11 a/b/g/n/ac, dual-band
Bluetooth 5.0
USB Type-C
WiFi 802.11 a/b/g/n/ac, dual-band
Bluetooth 5.0
USB Type-C
Dimensions159 x 75.1 x 8.9mm159.2 x 75.1 x 8.9mm
ColorsMidnight Blue
Raven Black
Ocean Blue
Space Black
15W Fast-charging
15W Fast-charging
Price4GB/64GB: INR12,999 (~Php9,000)
6GB RAM/128GB: INR14,999 (~Php10,700)
4GB/64GB: INR14,999 (~Php10,700)
6GB/128GB: INR15,999 (~Php11,400)

As you can see, the Samsung Galaxy M21 and Galaxy M31 are pretty much the same devices.

But if you’re more of a shutterbug, then you might want to consider the more expensive Samsung Galaxy M31, as their only key difference is in the camera department.

Samsung Galaxy M31

This thing comes with a 64-megapixel main shooter, which should capture better images than the 48-megapixel sensor on the Galaxy M21.

The Galaxy M31 also has the bragging rights of having four cameras with the addition of a 5-megapixel depth sensor. Although, the two have 8-megapixel ultra-wide and 5-megapixel macro cameras.

Samsung Galaxy M21

If you like taking selfies, you’d also prefer the Samsung Galaxy M31. This device boasts a 32-megapixel front-facing shooter, while the Samsung Galaxy M21 settles for a still impressive, 20-megapixel selfie camera.

But if you can settle for less interesting cameras, or if you have a limited budget to begin with, then you would still be pleased with the Galaxy M21.



This handset features the same 6.4-inch FHD+ Super AMOLED screen that the more expensive model has.

It is also powered by the Exynos 9611 processor, the same chipset found on the Galaxy M31 and premium midrange devices like the Galaxy A50s. You can get it with 4GB/64GB or 6GB/128GB of RAM and storage configuration.


Probably their most interesting similarities are in the batteries. Both devices come with a really generous 6,000mAh battery, which could easily last you for two days, depending on how you use it.

The included 15W fast charger is a welcome addition. Although, charging times might be slower in today’s standard. For comparison, a lot of midrange smartphones today use 20W+ and even 40W chargers on their 4,000mAh batteries.


Bottomline is, the Samsung Galaxy M21 is also ready a great device for the price. But if you don’t mind spending a few bucks more, then you might enjoy the better cameras on the Samsung Galaxy M31.


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