Our Opinion

The Samsung Galaxy A51 is a significantly better phone, but the Samsung Galaxy M40 is slightly better value for money. Which phone should you buy? Depends on how much you want to spend! But if budget is not a constraint, we recommend the Samsung Galaxy A51.

Samsung Galaxy A51  Samsung Galaxy M40 
Samsung Galaxy A51 Samsung Galaxy M40
Buy Now Buy Buy
Excellence Score
51.3
38.0
Value for Money Score
65.6
69.9
Price ₹ 23,990 onwards ₹ 16,990 onwards
Launch Date (India) Jan, 2020 Jun, 2019
Expected Launch Date N/A N/A
Smartphone OS Android 10Expected update to next Android version Android 9.0 Pie, Upgradeable to Android 10Expected update to next Android version
Touchscreen Yes (Capacitive) Yes (Capacitive)
Screen Size 6.5 inches 6.3 inches
Screen Resolution 1080x2400 pixels (~ 405 pixels per inch) 1080x2340 pixels (~ 409 pixels per inch)
Tall Aspect Ratio / Minimal Bezels Yes Yes
Scratch Resistant Display Yes, Corning Gorilla Glass 3 Yes, Corning Gorilla Glass
Display Type AMOLED IPS LCD
Display Features Super AMOLED Punch hole Camera
Full Physical QWERTY Keypad
Processor 2.3 GHz 2 GHz
Processor Type Octa Core Octa Core
Processor Name Samsung Exynos 9611Ranked #28 in Mobile Processor Benchmarks Qualcomm Snapdragon 675Ranked #22 in Mobile Processor Benchmarks
GPU Mali-G72 MP3 Adreno 612
RAM 6 GB 6 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 48MP + 12MP + 5MP + 5MP 32MP + 8MP + 5MP
Camera Auto-Focus Yes Yes
Camera Flash Yes Yes
HD Video Recording Yes (Full HD) Yes (4K)
Other Camera Features 48MP: f/2.0 Aperture; 1/2" Sensor Size; 0.8um Pixel Size; PDAF, 12MP: f/2.2 Aperture; 13mm Focal Length (Ultra-wide), 5MP: f/2.4 Aperture; Dedicated Macro camera, 5MP: f/2.2 Aperture; Depth sensor, Panorama, HDR 32MP: F/1.7 Aperture; 0.8um; PDAF, 8MP: F/2.2 Aperture; 12mm Focal Length (ultrawide); 1.12um Pixel Size; PDAF, 5MP: F/2.2 Aperture; Depth Sensor, Panorama, HDR, Video: 2160p@30fps; 1080p@30fps
Secondary Camera 32MP 16MP
Secondary Camera Features f/2.2 Aperture, 26mm Focal Length, 1/2.8" Sensor Size, 0.8um Pixel Size, HDR F/2.0 Aperture, HDR
Internal Memory 128 GB 128 GB
Expandable Memory Slot Yes, up to 512 GB Yes, up to 512 GB
Contacts Storage Unlimited Unlimited
SMS Storage Unlimited Unlimited
Music Player Yes Yes
FM Radio Yes Yes
Dual SIM GSM+GSM GSM+GSM (Hybrid SIM slot)
Thickness 7.9 mmMedium 7.9 mmMedium
Weight 172 gmMedium 168 gmMedium
Width 73.6 mmOk for one-handed use 73.9 mmOk for one-handed use
Audio Output 3.5mm jack USB-C
Water Resistant
Battery Capacity 4000 mAh 3500 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, 15W Fast Charger Yes, 15W Fast Charger
Other Battery Parameters N/A N/A
Fingerprint sensor Yes Yes
Other Features In-display fingerprint sensor; NFC; ANT+ Support; Noise Filtration; Dolby Atmos Noise Filtration; Dolby Atmos
2-minute Review [Positives]
  • Stunning looks, similar rainbow-like effects at the back as the Galaxy A50s when caught against the light, and a prism-like pattern that Samsung calls a “3D prism design” - it's a head-turner no doubt
  • While it supports a polycarbonate back, it still manages to look premium
  • The front looks stylish and modern too with a single punch-hole in the upper middle of the display
  • Compact and light for the display size and battery capacity, at just 172g, and 7.9mm in thickness
  • Bright, large 6.5-inches Super AMOLED panel with a full-HD+ resolution - its punchy colours make it a joy to stream content, while games also look great on the panel because of its high colour accuracy
  • There's Widevine L1 support by default, which makes streaming content in HD possible
  • Comes with Android 10 out of the box - Samsung's One UI 2 is now one of the better, more clean and streamlined Android UIs around, and is well optimised for modern large displays (like this one)
  • Samsung has also added some neat features including a Game Booster and an intuitive gesture-based navigation system
  • Decent performance with the same Exynos 9611 processor as the Galaxy A50s (similar to Qualcomm Snapdragon 660/665) - the experience is fairly smooth throughout with games like PUBG Mobile and Asphalt 9
  • Decent quad camera setup at the back - a 48MP primary sensor + 12MP wide-angle camera + 5MP macro camera + 5MP depth sensor
  • Under good light, the Galaxy A51's primary camera managed to capture detailed shots with good dynamic range - images are reasonably sharp, noise is also competently removed, colours are generally nice, and the phone strikes a good balance with saturation
  • The ultra wide-angle cam is a significant upgrade from the one on the A50s, and it offers improved sharpness and detail - dynamic range is also substantially better, making for an altogether pretty capable ultra-wide camera as far as mid-rangers go
  • Macro camera turns out quite good close ups - you can get a lot closer to your subject when using the macro camera and the sensor picks up a fair bit of detail
  • Very good portrait mode ("Live focus") - image quality is good and the depth camera helps the Galaxy A51 do a decent job of edge detection
  • The front 32MP camera is decent and produces nice colours, the detail is quite good as far as selfie cameras go - portrait selfie mode is decent too
  • Decent video recording from both primary and wide cameras with dedicated 'super steady' mode which allows you to shoot decent “action” videos (though stabilisation is not available at 4K)
  • Decent bottom-firing speaker - sufficient for personal listening
  • Solid, dependent battery life from the 4000 mah battery - will easily manage to get a day and a half's worth of regular use
  • Reasonable 15W fast charging - charges 67 percent in an hour (though, not as quick as others in this segment such as the Redmi K20 Pro)
  • Overall, a decent and likeable smartphone from Samsung - offers a polished experience, a slim and light body, solid battery life, a crisp display, and of course the Samsung brand (though, the performance at this price is a letdown)
  • The M40 is the first mid-range phone from Samsung with an Infinity O display (till now it was only available with the Galaxy S10 series) - the front camera is under the display in the hole punch on the top left of the screen which helps achieve a near bezel-less display - the phone is definitely a head-turner
  • The body is polycarbonate (though it feels glass-like) has a very premium look and a slight gradient effect
  • Polycarbonate body also means that the phone is pretty light-weight
  • The middle camera sensor at the back has a silver ring around it, which stands out very subtly
  • Large, bright display - you get good viewing angles and sharpness
  • Samsung's new One UI is one of the most clean, and refined implementations of Android at present, and is quite smooth in day-to-day use - so on the software front, Samsung scores a big point
  • Solid performance with the powerful Snapdragon 675 processor (same as Xiaomi Redmi Note 7 Pro) - everything from day-to-day performance, to games, is smooth
  • Decent set of triple rear cameras (standard + ultra-wide + depth)
  • Image quality is reasonably good in well-lit environments
  • Portrait shots came out really well with the subject well defined and the background blurred
  • The 16MP front camera also does a decent job of taking pictures in daylight - the photos look sharp with enough details and colours are close to natural
  • Overall, the camera performance isn’t the strongest in its price range, but fairly good overall
  • A stand out feature is the On Screen sound technology where the display doubles up as a speaker (it works well)
  • Good battery life with a 3500mAh battery - you can expect it to comfortably last the day - though of course it's not quite as brilliant as the 5000mAH batteries on the Galaxy M30 and M20
  • Samsung continues it's smart comeback into the mid-range with another good addition to the M-series - the M40 is a good alternative to consider in this price bracket, for people who want to prioritise a stylish cutting-edge design, and a 'notch-less' screen
2-minute Review [Negatives]
  • The in-display fingerprint sensor as well as the facial recognition are on the slower side
  • The glossy body is prone to picking up fingerprints
  • There's still some bloatware pre-installed, including third-party apps and some of Samsung's own apps such as Samsung Shop (though most of them can be uninstalled)
  • At this price, the performance feels weak - there are cheaper phones that offer much better performance, like the Redmi K20 & the Realme X2
  • Low light photos out of the Galaxy A51 aren't great (from all cameras) - The output is soft and noisy, while the colours are relatively desaturated
  • Overall, while the Galaxy A51 offers good cameras, there are certainly better options available, such as the Redmi K20 Pro
  • However, as far the value for money goes, the Galaxy A51 is far behind from the competition - there are better options like the Redmi K20 Pro which gets you a flagship-grade processor, an HDR display, more premium materials, and even better cameras - in fact, for a bit less money, you could also get the Redmi K20, which is also very capable
  • Both fingerprint unlock (the fingerprint sensor is on the back), and the face unlock, while decent, aren't the fastest
  • It's not AMOLED though, so purely quality wise, the display is not quite as vibrant and punchy as the Galaxy M30
  • Tends to warm up a little bit, during heavy gaming
  • Low light performance from both the rear and front cameras is pretty average though
  • There is no 3.5-mm headset jack, which could be an issue for some users (USB-C headphones are bundled though)
  • There is some pretty good competition though, make no mistake - there is Samsung's own Galaxy M30 (cheaper, better display, better battery, headphone jack, although it has a slightly inferior processor, and not the cutting edge 'punch-hole' design), the Poco F1 (flagship Snapdragon 845, headphone jack, though it doesn't have a very modern design), and the Redmi Note 7 Pro (cheaper, better battery, headphone jack, though MIUI is not as simple/refined as the One UI) - all of which are excellent value themselves, so what you chose will depend on what you value
Expert Reviews
  1. If you absolutely must have a Samsung, this one isn't bad to spend the brand-related premium on... but there are better options available
    gsmarena.com in-depth Read Review »
  2. A nice-looking phone that offers a beautiful AMOLED display, very good battery life, and we don’t mind the plastic build at all... but the performance is underwhelming
    phonearena.com in-depth Read Review »
  3. The Galaxy A51 appeals to those looking for a polished experience, a slim and light body, solid battery life, a crisp display, and of course the Samsung brand... but a more powerful processor at this price would be preferred
    gadgets.ndtv.com in-depth Read Review »
  4. The Galaxy A51 gets few things right like the great display, versatile camera setup, sleek design, and slim form factor... but it does not pack the power, considering its price point
    fonearena.com in-depth Read Review »
  5. There’s a lot to like including the Infinity-O display, stylish design as well as good cameras.
    indianexpress.com in-depth Read Review »
  6. Samsung Galaxy A51 has great design and display, decent cameras, reliable battery and Samsung's brand trust and loyalty... but performance could have been better
    ibtimes.co.in in-depth Read Review »
  7. A very respectable mid-range mobile
    stuff.tv in-depth Read Review »
  8. If you aren't too bothered about gaming and just want a great everyday driver which is sleek and lasts through the day on a single charge, the Galaxy A51 will certainly not disappoint... but the overall performance is a bit of a letdown
    in.mashable.com in-depth Read Review »
  9. Offer a unique Samsung experience tailored to the next gen Indian buyer
    indiatoday.in in-depth Read Review »
  10. The Galaxy A51 is a mid-range smartphone that does a good job in all areas and takes good photos
    notebookcheck.net in-depth Read Review »
  11. This is a phone that you could flaunt
    zeebiz.com in-depth Read Review »
  12. techpp.com in-depth Read Review »
  13. deccanchronicle.com in-depth Read Review »
  14. trustedreviews.com hands-on Read Review »
  15. themobileindian.com hands-on Read Review »
  1. We find it hard to recommend the Galaxy A60/M40 in the presence of phones such as the Realme X, and the Redmi K20 in the same price range
    gsmarena.com in-depth Read Review »
  2. A well balanced phone...but it's own sibling M30 undercuts the M40 to offer a better overall value
    techradar.com in-depth Read Review »
  3. Solid overall performer, and the most polished M-series offering by Samsung till date...but falls a bit short of being the undisputed leader that it could have been
    gadgets.ndtv.com in-depth Read Review »
  4. One of the finest smartphone in its price range
    bgr.in in-depth Read Review »
  5. Gets a lot of things right..If you are looking to buy a mid-range smartphone that offers a large display for watching videos, has a respectable camera and looks stylish, I think you should probably consider the Galaxy M40
    indianexpress.com in-depth Read Review »
  6. Power-packed device with a fresh look and good performance...set to further challenge rivals like Xiaomi
    economictimes.indiatimes.com in-depth Read Review »
  7. Ticks all the boxes for a premium mid-range phone
    hindustantimes.com in-depth Read Review »
  8. A great phone for its price
    livemint.com in-depth Read Review »
  9. Brings in a higher brand value than most of the other Chinese competition...If that prestige matters more than the marginally better user experience found on the others, then the Samsung M40 is your best option
    in.mashable.com in-depth Read Review »
  10. While the Galaxy M40 offers some neat features, it is ultimately undone by Samsung's own Galaxy A50, and M30, in the value-for-money stakes
    indiatoday.in in-depth Read Review »
  11. Overall, we did like the Samsung Galaxy M40
    timesnownews.com in-depth Read Review »
  12. themobileindian.com in-depth Read Review »
  13. androidauthority.com hands-on Read Review »
User Reviews
  1. Flipkart4.4 68+ reviews »
  2. Amazon4.2 116+ reviews »
  1. Flipkart4.2 34+ reviews »
  2. Amazon3.8 8,580+ reviews »
Official Website Official Website » Official Website »
Unofficial specs? N/A N/A
Individual Review 2
  • Individual Review 2
Individual Review

Samsung Galaxy S10 Lite Review - Pros, Cons & Everything...

C4ETech

Top Pick

Individual Review

Samsung Galaxy M40 Review with Pros & Cons - Mixed Feeli...

Geekyranjit

Top Pick

Full Review

Samsung Galaxy S10 Lite Review - Pros, Cons & Everything...

C4ETech

Full Review

Samsung Galaxy M40 Review with Pros & Cons - Mixed Feelings

Geekyranjit

Did you find phonecurry useful in your phone search? Drop us a testimonial, or Tell us how we can improve