Compare: Samsung Galaxy A51 (6GB RAM) vs Samsung Galaxy M31s (6GB RAM)

Our Opinion

The Samsung Galaxy M31s (6GB RAM) is a significantly better phone than the Samsung Galaxy A51 (6GB RAM), and is also significantly better value for money. What should you buy? Go for the Samsung Galaxy M31s (6GB RAM)!

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	Samsung Galaxy A51 (6GB RAM)	Samsung Galaxy M31s (6GB RAM)

Buy Now	Buy	Buy
Excellence Score	38.6	46.3
Value for Money Score	63.7	72.3
Price	₹ 20,999 onwards	₹ 17,999 onwards
Launch Date (India)	Jan, 2020	Aug, 2020
Expected Launch Date	N/A	N/A
Smartphone OS	Android 10Expected update to next Android version	Android 10Expected update to next Android version
Touchscreen	Yes (Capacitive)	Yes (Capacitive)
Screen Size	6.5 inches	6.5 inches
Screen Resolution	1080x2400 pixels (~ 405 pixels per inch)	1080x2400 pixels (~ 405 pixels per inch)
Tall Aspect Ratio / Minimal Bezels	Yes	Yes
Scratch Resistant Display	Yes, Corning Gorilla Glass 3	Yes, Corning Gorilla Glass 3
Display Type	AMOLED	AMOLED
Screen Refresh Rate	60 HzStandard	60 HzStandard
Display Features	Super AMOLED	N/A
Full Physical QWERTY Keypad
Processor	2.3 GHz	2.3 GHz
Processor Type	Octa Core	Octa Core
Processor Name	Samsung Exynos 9611Ranked #38 in Mobile Processor Benchmarks	Samsung Exynos 9611Ranked #38 in Mobile Processor Benchmarks
GPU	Mali-G72 MP3	Mali-G72 MP3
RAM	6 GB	6 GB
3G	Yes	Yes
4G	Yes	Yes
5G
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	64MP + 12MP + 5MP + 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	64MP: f/1.8 Aperture; 26mm Focal Length; 1/1.72"; 0.8um Pixel Size; PDAF, 12MP: f/2.2 Aperture; 123-degree ultra-wide lens, 5MP: f/2.4 Aperture; Macro Camera, 5MP: f/2.4 Aperture; Depth Sensor
Secondary Camera	32MP	32MP
Secondary Camera Features	f/2.2 Aperture, 26mm Focal Length, 1/2.8" Sensor Size, 0.8um Pixel Size, HDR	f/2.2 aperture, 26mm Focal Length, 1/2.8" Sensor Size, 0.8um Pixel Size, 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 (Wireless)
Dual SIM	GSM+GSM	GSM+GSM
Thickness	7.9 mmMedium	9.3 mmThick
Weight	172 gmMedium	203 gmHeavy
Width	73.6 mmOk for one-handed use	74.4 mmOk for one-handed use
Audio Output	3.5mm jack	3.5mm jack
Water Resistant
Battery Capacity	4000 mAh	6000 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, 25W Fast Charging
Included Fast Charger	Yes, 15.0W Fast Charger	Yes, 25.0W 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	UFS 2.1 Storage; FM Recording; Noise Filtration
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)	Sleek, classy design - the Galaxy M31s seems identical to the Galaxy A51, with a glossy polycarbonate back design - giving it a premium look The front gets a new trendy look with a hole-punch display, a first for the M-series It has good ergonomics and feels comfortable to hold and operate The side-mounted fingerprint scanner is quick to unlock the device Vivid, crisp and punchy 6.5-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 Dark mode enabled Samsung's OneUI is today one of the more clean, refined Android UIs that's especially well optimized for large displays like this one 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 M31s' AMOLED display), and Always On Display option Decent performance with the Exynos 9611 at the core (similar to Snapdragon 665) - the phone is good for basic operations Good quad rear camera setup - 64MP main sensor + 12MP wide-angle lens + 5MP depth sensor + a 5MP macro camera Shots taken with the primary camera during daylight are quite satisfactory, images are detailed, especially the 64MP shots, and they showcase the 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 single take is a nice addition from the more expensive S20 series, it lets you capture multiple formats at once 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 M31s 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 25W fast charging - the phone takes around 2 hours to charge the battery completely, which is decent Consider the Galaxy M31s for its vivid display, capable optics and stellar on-battery time
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	The Galaxy M31s feels hefty at 9.3mm thickness and 203g weight (though, it's worth it for the 6000 mAh battery it packs) However, it is an old chipset and heavy gaming and multi-tasking are taxing for the phone - the POCO X2 and the Realme 6 Pro are much better options that will handle gaming better than the Galaxy M31s Look elsewhere if performance and gaming capabilities are your primary deciding factors - the phones like Realme 6 Pro and Redmi X2 are better equipped to meet your requirements in the performance segment
Expert Reviews	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 in-depth Read Review » 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 in-depth Read Review » Galaxy A51 packs a great screen, a handful of cameras, and a big battery... but it's not a consistent performer in-depth Read Review » 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 in-depth Read Review » 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 in-depth Read Review » There’s a lot to like including the Infinity-O display, stylish design as well as good cameras. in-depth Read Review » 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 in-depth Read Review » A very respectable mid-range mobile in-depth Read Review » Offer a unique Samsung experience tailored to the next gen Indian buyer in-depth Read Review » Buy it for daily tasks, and if you like the looks... ignore if you're looking for power in-depth Read Review » This is a phone that you could flaunt in-depth Read Review » The Galaxy A51 is a mid-range smartphone that does a good job in all areas and takes good photos in-depth Read Review » 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-depth Read Review » A mid-ranger with plenty of polish in-depth Read Review » in-depth Read Review » in-depth Read Review » in-depth Read Review » in-depth Read Review » in-depth Read Review » in-depth Read Review » in-depth Read Review » hands-on Read Review » hands-on Read Review »	The Galaxy M31s gets a fresh look, the new Infinity-O AMOLED display, and faster charging with a higher capacity bundled charger, just the processor remains the same old in-depth Read Review » Best M-series smartphone yet in-depth Read Review » The Galaxy M31s gives a premium impression, good enough to give tough competition to the OnePlus Nord in-depth Read Review » The Galaxy M31s gets you the right combination of battery-friendly performance with a dash of style and the convenience and comfort of an AMOLED display... just don’t game on it in-depth Read Review » The Samsung Galaxy M31s is a capable smartphone that would have been an all-round package if it had a better processor in-depth Read Review » Buy it for the display and battery life in-depth Read Review » in-depth Read Review » in-depth Read Review » in-depth Read Review » in-depth Read Review » in-depth Read Review » in-depth Read Review » in-depth Read Review » in-depth Read Review » in-depth Read Review » in-depth Read Review » hands-on Read Review »
User Reviews	4.3 984+ reviews » 4.2 1,450+ reviews »	4.2 38+ reviews » 4.3 25,126+ reviews »
Official Website	Official Website »	Official Website »
Unofficial specs?	N/A	N/A