Compare: Oppo F15 (4GB RAM) vs Samsung Galaxy M21 (4GB RAM, 64GB)

Our Opinion

The Oppo F15 (4GB RAM) is a slightly better phone, but the Samsung Galaxy M21 (4GB RAM, 64GB) is slightly better value for money. Which phone should you buy? It’s a close call, but if your budget allows for it, then Oppo F15 (4GB RAM) might be a slightly better choice.

Features
Videos

only differences

all features

	Oppo F15 (4GB RAM)	Samsung Galaxy M21 (4GB RAM, 64GB)

Buy Now	Buy	Buy
Excellence Score	32.4	32.3
Value for Money Score	71.9	72.8
Price	₹ 12,999 onwards	₹ 12,499 onwards
Launch Date (India)	Jul, 2020	Mar, 2020
Expected Launch Date	N/A	N/A
Smartphone OS	Android 9.0 Pie, Upgradeable to Android 10Expected update to next Android version	Android 10Expected update to next Android version
Touchscreen	Yes (Capacitive)	Yes (Capacitive)
Screen Size	6.4 inches	6.4 inches
Screen Resolution	1080x2400 pixels (~ 411 pixels per inch)	1080x2340 pixels (~ 403 pixels per inch)
Tall Aspect Ratio / Minimal Bezels	Yes	Yes
Scratch Resistant Display	Yes, Corning Gorilla Glass 5	Yes, Corning Gorilla Glass 3
Display Type	AMOLED	AMOLED
Screen Refresh Rate	60 HzStandard	60 HzStandard
Display Features	N/A	Super AMOLED
Full Physical QWERTY Keypad
Processor	2.1 GHz	2.3 GHz
Processor Type	Octa Core	Octa Core
Processor Name	MediaTek Helio P70Ranked #52 in Mobile Processor Benchmarks	Samsung Exynos 9611Ranked #38 in Mobile Processor Benchmarks
GPU	Mali-G72 MP3	Mali-G72 MP3
RAM	4 GB	4 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 + 8MP + 2MP + 2MP	48MP + 8MP + 5MP
Camera Auto-Focus	Yes	Yes
Camera Flash	Yes	Yes
HD Video Recording	Yes (Full HD)	Yes (4K)
Other Camera Features	48MP: f/1.8 Aperture; 26mm Focal Length; 1/2.0" Sensor Size; 0.8um Pixel Size; PDAF, 8MP: f/2.2 Aperture; 13mm Focal Length (Ultra-wide); 1/4.0" Sensor Size; 1.12um Pixel Size, 2MP: f/2.4 Aperture; 1/5" Sensor Size; 1.75um Pixel Size (Dedicated macro camera), 2MP: f/2.4 Aperture; 1/5" Sensor Size; 1.75um Pixel Size; Depth sensor, HDR, Panorama, EIS	48MP: f/2.0 aperture; 26mm Focal Length; 1/2.0" 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; Depth Sensor, Panorama, HDR, Video: [email protected]; [email protected]; EIS
Secondary Camera	16MP	20MP
Secondary Camera Features	f/2.0 Aperture, 26mm Focal Length, 1/3.1" Sensor Size, 1.0um Pixel Size, HDR	f/2.0 aperture, 26mm Focal Length, HDR
Internal Memory	128 GB	64 GB
Expandable Memory Slot	Yes, up to 256 GB	Yes, up to 512 GB
Contacts Storage	Unlimited	Unlimited
SMS Storage	Unlimited	Unlimited
Music Player	Yes	Yes
FM Radio		Yes (Wireless)
Dual SIM	GSM+GSM	GSM+GSM
Thickness	7.9 mmMedium	8.9 mmMedium
Weight	172 gmMedium	188 gmMedium
Width	73.3 mmOk for one-handed use	75.1 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, 20W VOOC Flash Charge 3.0: 50% in 30 min	Yes, 15W Fast Charging
Included Fast Charger	Yes, 20.0W Fast Charger	Yes, 15.0W Fast Charger
Other Battery Parameters	N/A	N/A
Fingerprint sensor	Yes	Yes
Other Features	UFS 2.1 Storage; In-display Fingerprint Sensor; Noise Filtration	Noise Filtration
2-minute Review [Positives]	Slick, beautiful, eye-catching gradient finish on the back (though the back is laminated plastic and not glass) Fairly slim and light for a phone with such a large display Oppo F15's in-display fingerprint sensor and face unlock work very well - face unlock even works well in dimly lit places Very good 6.4-inch full-HD+ AMOLED display with a dewdrop notch and Gorilla Glass 5 protection - the colours are good, so is the sharpness - videos look sharp, with punchy colours, and the viewing angles are quite wide Display gets adequately bright and is legible even under sunlight You can watch Netflix and Prime in crisp HD resolution as Oppo F15 comes with Widevine L1 support ColorOS is fairly streamlined, and packs fast animations that help the phone feel snappy - there are of course several add-on features too, compared to what you would get in stock Android Decent performance with the MediaTek Helio P70 SoC (similar to Snapdragon 660) - day-to-day operations are smooth and you can even play games like PUBG Mobile on 'Medium' graphics setting Thermal performance is good too - the phone doesn't overheat when using the cameras extensively or even playing games Good quad-camera setup at the rear - 48MP primary + 8MP wide-angle + 2MP depth sensor + 2MP monochrome sensor The primary camera shoots oversampled 12-megapixel stills - in daylight, it captures fairly detailed landscape shots, colours are vivid, detail is good, and there's little to no noise in darker areas The wide-angle camera has autofocus, so stills taken have good detail, close-ups are sharp and detailed too - and if you get really close to your subject with the wide-angle camera, you'll be able to get good macro shots Portrait mode works decently well with human subjects and you can adjust the level of blur before taking the shot - edge detection is decent and image quality is good, when shooting under good light 16-megapixel selfie camera manages some pretty good-looking stills in daylight - skin textures are smoothen a bit but HDR works well and colours are well represented - with good amounts of artificial light around, it manages to get pleasing enough selfies even at night Video quality is decent and there is stabilisation when shooting using the primary camera The mono speaker gets fairly loud Battery life is pretty solid, backed by the 4000 mAh cell - will easily last a day and half with moderate use The Oppo F15 charges pretty quickly too with the supplied 20W Charger, about 88 percent in an hour Overall, Oppo F15 is a decent smartphone - it looks good, and it impresses particularly with its slimness, light weight, and good display	Decent looks and build quality - very similar to the Samsung Galaxy M31, with a a unibody polycarbonate design, and glossy finish on the back panel - the only major difference is the camera module which houses a triple rear camera The plastic body keeps the phone feeling relatively lightweight at 188 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 and work very well 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 M21's 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 Decent triple rear camera setup - a 48MP primary snapper, an 8MP ultra-wide lens and a 5MP depth sensor In broad daylight, you'll get consistent, crispy shots with decent dynamic range and sharpness levels are respectable with the primary lens 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) Live Focus shots are quite good 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 M21 does a good job of separating the subject from the background The 20MP selfie camera is quite good and takes detailed selfies (though, in low light, the quality goes down a notch and results are grainy) Monster 6000 mAh 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 If you're someone who consumes a lot of content on their phone, the Galaxy M21 is a good phone for you, it has great AMOLED display, outstanding battery backup that will last you for days
2-minute Review [Negatives]	Oppo F15 is a tall phone - it's not the easiest phone to fit into a pocket There is, as usual, some bloatware that comes pre-installed (but most of it can be uninstalled) While the chip offers decent performance, this chip is typically expected in phones closer to the Rs. 10, 000 mark (such as the Realme 3) - the Oppo F15 feels underpowered, considering that the Realme X2 and Redmi K20 offer Qualcomm's superior Snapdragon 730 series SoCs at the same price Selfie portrait mode doesn't work too well, unfortunately, whether it's day or night There are few caveats here, like there's no option to shoot at the full 48-megapixel resolution - other features such as super-steady video and the ability to use Night mode for the selfie camera are also absent In low light, image quality from both primary & wide-angle camera is average, details are weaker and there is visible noise in the darker regions - the ‘Night' mode helps brighten up scenes but the details don't improve much No 4K video recording, which most of its competitors support In low-light, video quality is noticeably worse with poor details and a persistent shimmer in the footage even with slight movement Overall, camera performance could have been better, as two of its main competitors, the Realme X2 & the Redmi K20 offer better image quality However, at this price, you're better off with either the Realme X2 or the Redmi K20 - both of which offer much better performance, even more premium build quality, and even more modern designs	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 M21'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 9 Pro and the Realme 6 are much better options that will handle gaming better than the Galaxy M21 Photos taken in low-light are average - focusing gets worse in low light and the extreme noise-correction makes images look like water paintings Overall, the cameras on the M21 are decent, but there are better cameras available in this price bracket, including the Galaxy M31, which is just a tad bit pricier Samsung Galaxy M11 falls behind in fast charging as competitors are offering close to 30W fast charging, the 15W on M21 feels low Having said that, the Redmi Note 9 Pro and the Realme 6 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 Realme 6 or the Redmi Note 8 Pro that are probably the best phones for gaming in this segment
Expert Reviews	A good-looking smartphone...but feels underpowered compared to its main rivals in-depth Read Review » Considering it as a whole package, the device is a bit overpriced in-depth Read Review » The Oppo F15 has only one thing going for it – design and feel in-depth Read Review » The Oppo F15 is a good phone that faces formidable competition, making it just too hard to recommend in-depth Read Review » Oppo F15 is a good-looking smartphone... but, feels quite under-powered in-depth Read Review » A decent smartphone for the price, but there's a lot of competition out there in-depth Read Review » Oppo F15 is a great phone.. however, the Realme X2 and Redmi K20 at similar or lower prices offer much more bang for the buck in-depth Read Review » Looking at the competition, the Oppo F15 doesn't pack in the right features to stand out in-depth Read Review » Looks good, has a great battery, but it's no powerhouse in-depth Read Review »	All the battery life you need in-depth Read Review » Great battery in an average package in-depth Read Review » A judicious mix of features and performance gets the day-to-day work done easily in-depth Read Review » Buy This For The Battery and Vivid AMOLED Display in-depth Read Review » A Phone That Caters Best To Video Content Consumers in-depth Read Review » Sharp display, good cameras, decent performance and an amazing battery life, though the Galaxy M31 is better in-depth Read Review » A good option if you are out in the market looking for a capable smartphone that is not Xiaomi or Realme in-depth Read Review » Big battery and display at an affordable price in-depth Read Review » in-depth Read Review » hands-on Read Review » hands-on Read Review »
User Reviews	4.4 2,847+ reviews » 4.2 1,191+ reviews »	4.3 368+ reviews » 4.2 47,913+ reviews »
Official Website	Official Website »	Official Website »
Unofficial specs?	N/A	N/A