Our Opinion

The Samsung Galaxy S9 64GB is a slightly better phone, but the Samsung Galaxy M31 64GB is significantly better value for money. Which phone should you buy? Depends on how much your want to spend!

Samsung Galaxy M31 64GB  Samsung Galaxy S9 64GB 
Samsung Galaxy M31 Samsung Galaxy S9
Buy Now Buy Buy
Excellence Score
49.6
52.0
Value for Money Score
81.7
59.9
Price ₹ 16,856 onwards ₹ 28,445 onwards
Launch Date (India) Mar, 2020 Mar, 2018
Expected Launch Date N/A N/A
Smartphone OS Android 10Expected update to next Android version Android 8.0 Oreo, Upgradeable to Android 10Expected update to next Android version
Touchscreen Yes (Capacitive) Yes (Capacitive)
Screen Size 6.4 inches 5.8 inches
Screen Resolution 1080x2340 pixels (~ 403 pixels per inch) 1440x2960 pixels (~ 568 pixels per inch)
Tall Aspect Ratio / Minimal Bezels Yes Yes
Scratch Resistant Display Yes Yes, Corning Gorilla Glass 5
Display Type AMOLED AMOLED
Display Features Super AMOLED Super AMOLED, 3D Touch (home button only), Always-on Display, Infinity Display
Full Physical QWERTY Keypad
Processor 2.3 GHz 2.8 GHz
Processor Type Octa Core Octa Core
Processor Name Samsung Exynos 9611Ranked #30 in Mobile Processor Benchmarks Exynos 9810Ranked #12 in Mobile Processor Benchmarks
GPU Mali-G72 MP3 Mali-G72 MP18
RAM 6 GB 4 GB
3G Yes Yes
4G Yes Yes
VoLTE Yes Yes
WiFi Yes Yes
VoWiFi/WiFi-Calling Yes Yes
GPS Yes Yes
Bluetooth Yes Yes
Connecting Port USB-C USB-C
Primary Camera 64MP + 8MP + 5MP + 5MP 12.0MP
Camera Auto-Focus Yes Yes
Camera Flash Yes Yes
HD Video Recording Yes (4K) Yes (4K)
Other Camera Features 64MP: f/1.8 aperture; 26mm Focal Length; 1/1.72" Sensor Size; 0.8um Pixel Size; PDAF, 8MP: f/2.2 aperture; 12mm Focal Length; Ultra-wide; 1/4.0" Sensor Size; 1.12um Pixel Size, 5MP: f/2.2 aperture; 25mm Focal Length; Macro Lens; 1/5.0" Sensor Size; 1.12um Pixel Size, 5MP: f/2.2 aperture; Depth Sensor, Panorama, HDR, Video: 2160p@30fps; 1080p@30fps; EIS F/1.5-2.4 Aperture, 26mm Focal Length, 1/2.5" Sensor Size, 1.4µm Pixel Size, Dual Pixel PDAF, Phase Detection Autofocus (PDAF), Optical Image Stabilisation (OIS), Geo-tagging, Simultaneous 4K video and 9MP image recording, Touch focus, Face/Smile Detection, Auto HDR, Panorama, HDR, Dual-Video rec., Slow-motion Video
Secondary Camera 32MP 8.0MP
Secondary Camera Features f/2.0 aperture, 26mm Focal Length, 1/2.8" Sensor Size, 0.8um Pixel Size, HDR F/1.6 Aperture, Autofocus, Full HD+ Video Recording, Dual Video call, Auto HDR
Internal Memory 64 GB 64 GB
Expandable Memory Slot Yes, up to 512 GB Yes, up to 400 GB
Contacts Storage Unlimited Unlimited
SMS Storage Unlimited Unlimited
Music Player Yes Yes
FM Radio Yes (Wireless)
Dual SIM GSM+GSM GSM+GSM (Hybrid SIM slot)
Thickness 8.9 mmMedium 8.5 mmMedium
Weight 191 gmHeavy 163 gmMedium
Width 75.1 mmOk for one-handed use 68.7 mmComfortable for one-handed use
Audio Output 3.5mm jack 3.5mm jack
Water Resistant Yes, IP68 Rated (up to 1.5m for 30 mins)
Battery Capacity 6000 mAh 3000 mAh
Battery Standby N/A N/A
Battery Standby (3G) N/A N/A
Battery Talktime N/A N/A
Battery Talktime (3G) N/A N/A
Fast Charging Support Yes, 15W Fast Charging Yes
Included Fast Charger Yes, 15.0W Fast Charger Yes
Other Battery Parameters N/A N/A
Fingerprint sensor Yes Yes
Other Features UFS 2.1 Storage; FM Recording; Noise Filtration Scratch Resistant Back (Corning Gorilla Glass 5); Samsung DeX (desktop experience support); Qi Wireless charging; Bixby; NFC; ANT+ support; Stereo Speakers; Noise Filtration; Samsung Pay
2-minute Review [Positives]
  • Decent looks and build quality - very similar to the Samsung Galaxy M30s, with a a unibody polycarbonate design, and glossy finish on the back panel - the only major difference is the camera module which now packs a fourth camera
  • The plastic body keeps the phone feeling relatively lightweight at 191 grams, which is mighty impressive for a phone packing a big 6000 mAh battery
  • It also feels great to hold with a seamless curved panel that meets the display up front
  • Modern, Infinity-U front - bezels around the screen are slim, except for a slightly thick chin - you still get around 90 per cent screen-to-body ratio, which is great
  • Fingerprint sensor at the back is easy to reach
  • Gorgeous, 6.4-inch FHD+ Super AMOLED display with excellent viewing angles, and brightness levels - easily one of the best displays in the price bracket
  • It also comes with "Widevine L1" certification, which helps stream content in crisp HD resolution
  • Blacks are deep on the AMOLED display, which looks good with Night mode enabled
  • Samsung's OneUI is today one of the more clean, refined Android UIs that's especially well optimised for large displays like this
  • One UI also brings in other useful stuff, like a System-wide Dark mode (which turns the background completely black, and looks great on the M30s' AMOLED display), and Always On Display option
  • Decent performance with the Exynos 9611 at the core (similar to Snapdragon 665) - the device is fairly quick to load up apps - multitasking is a breeze
  • Good quad rear camera setup - 64MP main sensor + 8MP wide-angle lens + 5MP depth sensor
  • Shots taken with the primary camera during daylight are quite satisfactory, images are detailed, especially the 64MP shots, and they showcase good dynamic range
  • The ultra-wide sensor, like on any budget phone, is a good addition - it takes social media-worthy images in great lighting conditions (in low-light, the quality dips and pictures look grainy and noisy, wide-angle shots also have barrel distortion at the edges)
  • Photos taken in low-light looks good - switching to Night mode helps reduce grain in the output and further improves image quality
  • Live Focus shots are quite impeccable and the camera app does give you the option to set the level of blur before taking a shot - edge detection is very good and the Galaxy M31 does a good job of separating the subject from the background
  • The macro camera takes decent shots outdoors (though, the quality dips when indoors and the output is restricted to 5MP in resolution)
  • The 32MP selfie camera is quite good and takes detailed selfies (though, in low light, the quality goes down a notch and results are grainy)
  • Overall, the cameras on the M30s are good for the price bracket, even though they are not the best (that title crowned to the POCO X2)
  • Monster 6000mAh battery delivers an incredible 2-3 days of usage easily, making for one of the largest battery life smartphones currently available
  • Supports 15W fast charging
  • Samsung has seen success with the Galaxy M30s, so it didn't want to fix what isn't broken, they upgraded the RAM, put in a fourth rear camera, and preloaded Android 10 - if you don't care for benchmark scores and just want a device that covers the basics and has great AMOLED display, has great battery backup and has a versatile set of cameras, the Galaxy M31 will do just fine
  • Absolutely luscious design, continuing the design language that was introduced with the Galaxy S8 series (which is not a bad thing at all) - and it has some really sizzling color options in purple and blue, which really helps those supple curves stand out - the body colors look deep, rich and ever-changing thanks to the way the glossy glass catches the light - you will be hard pressed to find anything remotely as elegant, and beautiful in the Android market
  • The S9's tall, narrow proportions fit your hand well - and it's significantly easier to handle than its larger cousin (S9+)
  • The biggest design change is on the back, where the fingerprint reader moves below the camera module - this corrects the worst design mistake of both Galaxy S8 phones and the Note 8
  • Water resistant body
  • The tall, 18:9, minimal bezel, 5.8-inch AMOLED screen is absolutely gorgeous and even brighter than last year's (15 percent brighter, in fact) - and the sexy dual-curved design adds to the charm
  • Samsung software on top of Android adds some useful extras, extending the core functionality of Android - it is one of the better, more refined UIs in the Android world
  • Whiplash-fast performance backed by the super powerful Samsung's Exynos 9810 (similar to the Snapdragon 845 in terms of performance) - performance is top-notch as expected under all use cases
  • Terrific camera - the first to bring a mechanical dual-aperture lens from DSLRs to the much tinier mobile phone, a feature that's designed to let in more light, reduce image noise and generally make your photos a lot better
  • The image quality in well lit situations is top-notch
  • Low light performance often borders on astounding - with the amount of brightness & lack of noise you will find in the shots (thanks to the dual aperture lens) - although its not very consistent (some low light photos are oddly washed out)
  • The super-slow motion video mode is pretty cool too, and when you frame the shot well, can give some incredible result
  • The selfie camera is good too, and has a new Selfie Focus mode, which uses software (and not a second lens) to create a depth effect with the front-facing camera, similar to the Pixel 2, or the iPhone X
  • On the whole the cameras on the Galaxy S9 compare well with the those on the other top camera phones - the Google Pixel 2, and the iPhone X - it's a toss up between these 3 - the Galaxy S9 can produce some truly exceptional shots especially in the dark, but perhaps the iPhone X and the Pixel 2 are just a bit more consistent all round, everything considered
  • Dual-speaker system is excellent, and makes for loud, rich audio - and results in one of the best speaker experience of any smartphone, ever
  • Call quality is fantastic too, with the AKG tuning really paying off
  • Also has the good old-fashioned headphone jack! (that's missing in a lot of other flagships now)
  • Good (though not exceptional) battery life - will definitely last the work day on a single charge
  • Supports fast charging (although it's not the fastest around)
  • Supports wireless charging
  • DeX Pad support is another cool feature that enhances the Desktop Experience Samsung introduced on last year’s flagship Galaxy phones
  • On the whole, while outside of the display, the S9 isn’t a class leader in any category, but it’s good enough in all of them that the whole package makes for a great flagship phone - it will compete with the Pixel 2/XL and the iPhone X for the title of the best smartphone - which one of these 3 you might choose will depend on what specific things you value
2-minute Review [Negatives]
  • The power button and volumes are quite flush with the frame which means they lack that tactile, clicky feel
  • Design feels a bit dated and underwhelming, there is no spark in Galaxy M31's design as we see in other brand's phones like Xiaomi and Realme
  • However, this is an old chipset and heavy gaming isn't best on this phone - the Redmi Note 8 Pro, the POCO X2 and the Realme XT are much better options that will handle gaming better than the Galaxy M31
  • Samsung Galaxy M31 falls behind in fast charging as competitors are offering close to 30W fast charging, the 15W on M31 feels low
  • Having said that, the Redmi Note 8 Pro and the Realme X2 will still offer you more bang for your buck overall and when it comes to intensive tasks like gaming, you’ll be better off choosing the POCO X2 or the Redmi Note 8 Pro that are probably the best phones for gaming in this segment
  • Fragile glass front and back means you should buy a case day 1
  • The new face-unlock tool is not particularly secure (it might have been better for Samsung to build out a more refined version before rushing in to compete with the similar feature on the iPhone X)
  • The 3D avatar software is again not that well executed - the AR Emojis track your expressions poorly and need far more customization options
  • There’s also still no compelling use case for Bixby, Samsung's AI agent (though of course you have no compulsion to use it, and can instead keep using the Google Assistant)
  • While the camera is great generally, it can sometime make low-light photos look blurry and lack detail - even though brightness levels is excellent and noise is minimal - so its sometimes a double edged sword
  • The S9 also lacks the second rear lens of the step-up S9 Plus that's dedicated to creating those depth-of-field portrait shots that blur the background to make people and objects pop
  • Battery life is good, but not exceptional - some of the competition is ahead here
  • Everything considered, S8 owners can skip the upgrade - the S9 is excellent all-round, and incrementally better - but it's not a monumental change from the S8
  • Apart from the iPhone X and the Pixel 2/XL, the S9 will also face tough competition now from lower priced flagships like the OnePlus 5T, which are almost as good on most of the important counts
Expert Reviews
  1. If you don't care for benchmark scores and just want a device that covers the basics and has a great battery, the Galaxy M31 will do just fine... though, not the best bang for the buck
    gadgets.ndtv.com in-depth Read Review »
  2. Improved cameras, more RAM and the battery is just as reliable as before
    bgr.in in-depth Read Review »
  3. The combination of simple looks, lightweight design, capable quad cameras and perhaps above all the insanely long battery life makes the Galaxy 31 worth the money
    indianexpress.com in-depth Read Review »
  4. If you are looking for a smartphone that gives you long-lasting battery life, then Galaxy M31 is meant for you... not for power users though
    themobileindian.com in-depth Read Review »
  5. Massive 6000mAh battery, upgraded camera
    thenewsminute.com in-depth Read Review »
  6. Unbelievably compact for a smartphone that packs a massive 6000 mAh battery
    zeebiz.com in-depth Read Review »
  7. Perfect fit for the folks who aren't into gaming
    firstpost.com in-depth Read Review »
  8. You can go for Galaxy M31 if you want a reliable battery, an immersive display and camera-centric features packed in a handset... but it's no powerhouse
    timesnownews.com in-depth Read Review »
  9. The Samsung Galaxy M31 is a reliable smartphone that makes use of a great AMOLED display, has great battery backup and has a versatile set of cameras... but you’ll be better off choosing the POCO X2 or the Redmi Note 8 Pro if you like gaming
    in.mashable.com in-depth Read Review »
  10. Despite being good enough for now, the Galaxy M31 just doesn’t enthuse the kind of confidence that would see it being considered in the same breath as more powerful devices from Redmi and Realme
    indiatoday.in in-depth Read Review »
  11. gsmarena.com hands-on Read Review »
  12. fonearena.com hands-on Read Review »
  13. ibtimes.co.in hands-on Read Review »
  14. techpp.com hands-on Read Review »
  1. You can hardly find anything remotely as elegant, as advanced, and as polished, all in a single product, on the Android market
    phonearena.com in-depth Read Review »
  2. Thanks to blazing performance, solid cameras and long battery life, the Galaxy S9/S9+ continue to uphold the S series’ reputation for excellence
    engadget.com in-depth Read Review »
  3. If you're looking to upgrade your phone, especially if you're already a devoted Samsung customer, this one has everything you'd want.
    wired.com in-depth Read Review »
  4. Both Galaxy S9 and S9+ are solid, dependable workhorses with excellent displays, premium craftsmanship, and improved cameras
    gadgets.ndtv.com in-depth Read Review »
  5. Impressive, to say the least
    bgr.com in-depth Read Review »
  6. Samsung gets it exactly right
    mashable.com in-depth Read Review »
  7. The S9 and S9+ are probably the best Android phones for most users, and I’d have no problem recommending them to almost anyone
    androidauthority.com in-depth Read Review »
  8. gsmarena.com in-depth Read Review »
  9. cnet.com in-depth Read Review »
  10. theverge.com in-depth Read Review »
  11. techradar.com in-depth Read Review »
  12. independent.co.uk in-depth Read Review »
  13. telegraph.co.uk in-depth Read Review »
  14. bgr.in in-depth Read Review »
  15. alphr.com in-depth Read Review »
  16. expertreviews.co.uk in-depth Read Review »
  17. tomsguide.com in-depth Read Review »
  18. androidcentral.com in-depth Read Review »
  19. zdnet.com in-depth Read Review »
  20. slashgear.com in-depth Read Review »
  21. cnbc.com in-depth Read Review »
  22. indiatoday.in in-depth Read Review »
  23. thenextweb.com in-depth Read Review »
  24. pcworld.com in-depth Read Review »
  25. androidpolice.com in-depth Read Review »
  26. techadvisor.co.uk in-depth Read Review »
  27. gizmodo.com in-depth Read Review »
  28. digitaltrends.com hands-on Read Review »
  29. trustedreviews.com hands-on Read Review »
  30. news18.com hands-on Read Review »
  31. stuff.tv hands-on Read Review »
  32. t3.com hands-on Read Review »
  33. wired.co.uk hands-on Read Review »
  34. mirror.co.uk hands-on Read Review »
User Reviews
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Individual Review 2
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