Samsung is one of the most prolific smartphone manufacturers these days. Last week, the brand introduced yet another affordable phone in M-series, the Galaxy M21, which is more similar than different to the Galaxy M31 or even the M30s. (Samsung Galaxy M21 Review हिंदी में पढ़िए)

At an economical starting price of Rs. 12,999, the Galaxy M21 offers an AMOLED screen, 6000mAh battery, a decent amount of RAM and storage, and of course, Samsung branding. 

In our Samsung Galaxy M21 review, we will detail our experience with the phone and also compare it with the clashing Samsung phones as well as other alternatives from Realme and Xiaomi. Hopefully, this should help you decide whether or not to buy the Galaxy M21.   

Samsung Galaxy M21 Price and Specifications

ModelSamsung Galaxy M21
Display 6.4-inch, AMOLED, 1440 x 2400 (full HD+), Gorilla Glass 3
Chipset10nm Exynos 9611 (2.3GHz octa-core; Mali G72MP3 GPU)
Storage64GB/ 128GB; Dedicated card slot (512GB)
SoftwareAndroid 10, OneUI 2.0
Rear camera48MP, f/2.0 (primary) 8MP primary, f/2.25 (wide-angle) 5MP, f/2.2 (depth sensor), 5MP, f2.4 (macro) 480fps slow-motion videos, EIS, UHD videos
Selfie camera32MP, f/2.0
Fingerprint sensorCapacitive (rear-mounted)
Dimensions and weight8.9 mm; 164 grams
Battery 6000mAh, 15W fast charging
ColoursOcean Blue, Space Black
PriceRs. 14,999 (6GB + 64GB), Rs. 16,999 (6GB + 128GB)

Samsung Galaxy M21 Unboxing: Box Content

Box contents remain the same as of other M-series phones. Samsung doesn’t bundle headphones, protective case, or pre-install any plastic screen protector. The Galaxy  M21 box includes: 

  • 15W Adaptive fast-charging adaptor 
  • USB cable (Type-C)
  • SIM ejector tool and documentation

Samsung Galaxy M21 review: Design and Build

Samsung Galaxy M21 looks almost the same as Galaxy M31 (review) or even the Galaxy M30s. All of these phones are surprisingly light, considering the 6000mAh batteries on board. For consumers who prioritize big batteries, this shall be a definite advantage.

The Redmi Note 9 Pro Max also offers a sizeable 5000mAh battery, but it’s nowhere near as handy as these Samsung M-series phones. 

On the downside, the glossy plastic back feels a bit flimsy and cheap. Not that this should be much of an issue once you use a protective case. And, frankly, the water-drop notch now feels outmoded.  

The Galaxy M21 covers most essentials – Gorilla Glass 3 scratch resistance, dedicated card slot, USB Type-C charging port, and audio jack are all there. The fingerprint sensor at the back is fast and reliable, which is why we’d take it over Samsung’s optical in-display sensors on more expensive A-series phones any day. 

So, long story short, the Galaxy M21 isn’t very premium in its feel, but it’s very well designed for a big battery phone and covers most basics. 

Also Read: Phones with AMOLED display under Rs. 20,000

Samsung Galaxy M21 review: Display 

The Galaxy M21 has a punchy 6.4-inch AMOLED display and supports HD streaming on popular streaming apps like Netflix and Prime videos – which is not something we can say for rival Xiaomi or Realme phones. 

Not all AMOLED displays are equal, and the one on the M21 is expectedly inferior to what you’d get on phones like Galaxy A51, but it’s still a great screen to watch videos. Consumers can choose between two color profiles – vivid and natural – and enjoy AMOLED perks like deep blacks in dark mode and always-on mode. 

The display isn’t exceptionally bright, but we didn’t face any trouble using the phone under direct sunlight on occasions. 

Also Read: Samsung Galaxy A51 review

Samsung Galaxy M21 review: Performance and Software 

When it comes to performance, the Galaxy M21 can’t quite match up to Realme and Xiaomi options. The Exynos 9611 powering the phone is not particularly snappy and isn’t meant for hardcore gamers, but does feel adequate for light and moderate day-to-day usage. 

Games like PUBG are playable, but the performance isn’t as smooth in the default settings. In Smooth -extreme settings, the gameplay feels quite responsive. 

The higher positioned Galaxy M31 doesn’t have a 4GB RAM option and starts at 6GB + 64GB. The M21 starts at 4GB LPDDR4x RAM + 64GB storage and there’s a 6GB + 128GB variant as well. 

I for one certainly consider the well designed OneUI 2.0 software (Android 10) a massive advantage over Realme UI and MIUI, but this is a subjective matter and your preferences might differ. Ads and recommendations aren’t as intrusive, and the software is feature-rich and well laid out. 

The call quality is great in our area. The phone supports all relevant connectivity options including Bluetooth 5.1, Wi-Fi calling, and Dual SIM VoLTE. 

Samsung Galaxy M21 review: Camera performance 

Samsung Galaxy M21 has three cameras on the rear. The primary camera is a 48MP sensor (as against 64MP on Galaxy M31) and it’s accompanied by an 8MP wide-angle shooter and a 5MP depth sensor.

In proper daylight, the Galaxy M21 shoots detailed and well-metered shots. The camera quality is almost similar to that of the Galaxy M31.

Portrait shots also turned out better than anticipated. The wide-angle camera can be used to capture wider landscapes in proper lighting. The quality is strictly average and we don’t see anyone using this frequently.

In low light, the quality deteriorates. The Galaxy M31 performs comparatively better. The Galaxy M21 has a night mode, but the camera struggles to focus in night mode. The 20MP selfie camera does a decent job, but the one on the Galaxy M31 fairs better in low light. 4k video recording is supported, but the best results come with 1080p and super steady turned on.

Samsung Galaxy M21 review: Battery and Audio 

With a 6000mAh powerhouse and a power-efficient chipset on board, battery mileage shouldn’t be a concern. Due to Coronavirus lockdown, we were restricted to our homes, and our battery could easily last for more than 2 days. 

The 15W fast charging isn’t exactly fast, though. You’d still need around 2.5 hours to fully recharge the battery. 

The audio output via the bottom-firing speaker is reasonably loud and the quality is above average. The same goes for audio via headphones. 

Also Read: Realme 6 Pro Review

Samsung Galaxy M21 Review: Verdict, Pros & Cons

For starters, the Galaxy M21 offers almost the same experience as the Galaxy M31, but the later justifies its higher price with better low-light camera performance and better selfie camera performance. The Galaxy M21 could just as well have been the 4GB RAM variant of the M31. 

Of course, online exclusive phones from Realme and Xiaomi have more powerful chipsets, but the extra horsepower they offer doesn’t come without a few compromises. 

The Samsung Galaxy M21 can Galaxy M31 can match with these phones in terms of camera performance, are significantly slimmer and lighter and,  if you ask us, have a more refined software – which are all legit advantages.  


  • Relatively lighter than other ace rivals
  • AMOLED display and HD streaming support
  • Massive battery
  • Dedicated card slot
  • Fast biometric unlock


  • Mediocre gaming 
  • Charging isn’t fast enough

Samsung Galaxy M21 FAQs answered

Should I buy the Galaxy M21 or the Galaxy M31?

The experience of both phones is almost similar. The Galaxy M31 shows slightly better low-light camera performance and has an extra macro camera.

Does Galaxy M21 support slow-motion video recording?

Yes, the Galaxy M21 supports 480fps slow-motion video recording.

Does Galaxy M21 have Wi-Fi calling and Dual 4G VoLTE?

Yes, it does.

What is the SAR value of Samsung Galaxy M21?

SAR value for Galaxy M31 is 0.383 W/ KG head.

What are default PUBG settings in Galaxy M21?

By default, PUBG runs in HD graphics and High frame rate. The gameplay is better in Smooth-extreme.


  1. i am facing hanging and screen frozen issue. Service center first update software afterthat they replaced mother board fortunately mobile work but after three month facing the same issue, now my child play with that dummy mobile.

  2. I bought Samsung M21 in the month of November 2020. Soon after 8 months, the display started bleeding. I am a person who handles Phone very gently and never even dropped it not faced any sort of water logging. basically the phone is under warranty and when I approached the service center, they told it cant be serviced under warranty and will cost me around 4200. now i even came to know similar issues in M21 Samsung A50 and even J7 models. Is this some sort of a default issue with Samsung?

  3. Don’t compare Samsung display with other phones it is very superior than Chinese mobiles, many are appreciating mi phones, I think it is paid review, one eg. Yesterday I bought boat stone grenade bt speaker after viewing you tube, but I disappointed, it is far behind jbl, infinity, and creative

  4. the problem is almost solved with last update
    how ever kindly use dark mode and disable adaptive display mode

    you are fine to use this gem.
    mine with 6 gb 128 gb

  5. I am using Samsung M21
    Following problems are found.

    1. Battery life short : Though the phone is having 6000 mah battery, it is not giving battery life as expected.

    2. It takes a long time to fully charge the battery

    3. The keyboard doesnot support Clipboard function

    4. It is heavier when compared to other models

    4. Overall, this phone’s hotspot is not detected by PC / Laptop

    • Yes me too have the same problem i cant connect my phone hostpost to my laptop.And battery is not like 6000mah it look like 4000mah and i cant able to send photos in whattsapp it takes to much time to load

  6. is there any usb tethering issue for this moblile with laptop and the hotspot not shoeing for the laptop is the issue for m21 or i got any defect piee

  7. I don’t have heating issues as mentioned above.i’m a gamer and this device hits smooth-extream profile in quite good and lots of pro players using low setting because of the field of view is clear than high settings.and the main advantage is the amoled screen and 6000mah battery it is giving amazing performance on satisfied of buying this in low price.good product and no network issues detected.

  8. Do not buy.. network reception issues and call drop even in full network areas.. heating problem.. not at all worth it.. bought it 2 days back.. multiple issues.. highly disappointed.. do not just go with specifications

  9. Samsung M21 has 6.4 inch screen with super amoled screen and 4GB of RAM which will make the usage really a good experience.

    I have been using Samsung M21 for the last 2 months and lately I found a serious problem with the phone.

    The Camera on Samsung M21 has serious problems

    Yesterday when I was trying to open my camera, it turned unresponsive. The entire screen turned black and no buttons in the camera interface where not working. I thought that camera is having a cache problem, so I went into the camera app settings, forced stopped the camera app and cleared cache and files.

    Now the camera app started working but once I switched to selfie camera, everything turned bleak. The entire display became unresponsive and the camera app forced close by itself with a message “camera failed “.

  10. Ringtone cannot be changed on samsung m21 also the screen will not show the caller notification during calls.It will take a while to know who is calling.There is no pop up notification for WhatsApp.Very much disappointed made a mistake in buying the worst.

  11. I got my samsung m21 today. I found it’s background display a bit yellowish in comparison to my redmi note 7 pro which is pure white background. Is it normal or a bug?

    • actually Redmi Note 7 Pro screen leans towards colder colors that’s might be a reason why you feel M21 display bit yellowish. Still for your satisfaction, I would suggest you request for replacement from e-commerce seller or get your phone checked from Samsung.

    • I agree. recently I bought M21 (blue) for my Mom.. She complained that whatsapp background is yellowish in colour where as her previous mobile Redmi Note 4 was pure white. However, after applying the screen guard, her issue got resolved to major extent.

    • There is no doubt that samsung giving better displays than redmi,realme or vivo. And the retina is also made by samsung corporations

  12. Hi, I have purchased samsung m21 recently, but it’s hanging quite often, I have no choice left, but return the phone.
    Now again it’s exchange of the same brand.
    What is your say about hanging or screen freez issue


  13. Bro should i get the m21 or the redmi note 9 pro…i love gaming but is not an intense pubg player…in fact i prefer story mode games..

  14. Hi Deepak, I am thinking of buying Samsung m21 smartphone,but I am confused which variant should I buy like 4gb or 6gb.How much ram is available on 4gb in default


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