Our Opinion

The Oppo F15 is a slightly better phone, but the Vivo S1 Pro 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 might be a slightly better choice.

Oppo F15  Vivo S1 Pro 
Oppo F15 Vivo S1 Pro
Buy Now Buy Buy
Excellence Score
46.7
44.3
Value for Money Score
69.0
71.1
Price ₹ 19,990 onwards ₹ 18,099 onwards
Launch Date (India) Jan, 2020 Jan, 2020
Expected Launch Date N/A N/A
Smartphone OS Android 9.0 PieExpected update to next Android version Android 9.0 PieExpected update to next Android version
Touchscreen Yes (Capacitive) Yes (Capacitive)
Screen Size 6.4 inches 6.38 inches
Screen Resolution 1080x2400 pixels (~ 411 pixels per inch) 1080x2340 pixels (~ 404 pixels per inch)
Tall Aspect Ratio / Minimal Bezels Yes Yes
Scratch Resistant Display Yes, Corning Gorilla Glass 5 Yes
Display Type AMOLED AMOLED
Display Features N/A Super AMOLED, 2.5D Curved Glass
Full Physical QWERTY Keypad
Processor 2.1 GHz 2 GHz
Processor Type Octa Core Octa Core
Processor Name MediaTek Helio P70Ranked #41 in Mobile Processor Benchmarks Qualcomm Snapdragon 665Ranked #37 in Mobile Processor Benchmarks
GPU Mali-G72 MP3 Adreno 610
RAM 8 GB 8 GB
3G Yes Yes
4G Yes Yes
VoLTE Yes Yes
WiFi Yes Yes
VoWiFi/WiFi-Calling
GPS Yes Yes
Bluetooth Yes Yes
Connecting Port USB-C USB-C
Primary Camera 48MP + 8MP + 2MP + 2MP 48MP + 8MP + 2MP + 2MP
Camera Auto-Focus Yes Yes
Camera Flash Yes Yes
HD Video Recording Yes (Full HD) Yes (Full HD)
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/1.8 Aperture; 1/2" Sensor Size; 0.8um Pixel Size; PDAF, 8MP: F/2.2 Aperture; 13mm Focal Length (Ultra-wide); 1/4" Sensor Size; 1.12um Pixel Size, 2MP: F/2.4 Aperture; 1/5" Sensor Size; 1.75um Pixel Size (Macro camera), 2MP: F/2.4 Aperture; Depth Sensor, HDR, Panorama, AI Portrait Lighting, AI Super Wide Angle, Bokeh and Shot Re-Focus, Super Macro, Super Night Mode, Live Photo, AR Stickers, AI Portrait Framing, AI Scene Identification, Ultra Wide Video, Slo-Mo, Time Lapse
Secondary Camera 16MP 32MP
Secondary Camera Features f/2.0 Aperture, 26mm Focal Length, 1/3.1" Sensor Size, 1.0um Pixel Size, HDR F/2.0 Aperture, 0.8um Pixel Size, HDR, AI Face Beauty, Filters, AI Portrait Lighting, Group Selfie (Panorama), Super Night Selfie, Live Photo, AR Stickers, Watermark, Mirror Selfie
Internal Memory 128 GB 128 GB
Expandable Memory Slot Yes, up to 256 GB Yes, up to 256 GB
Contacts Storage Unlimited Unlimited
SMS Storage Unlimited Unlimited
Music Player Yes Yes
FM Radio Yes
Dual SIM GSM+GSM GSM+GSM (Hybrid SIM slot)
Thickness 7.9 mmMedium 8.7 mmMedium
Weight 172 gmMedium 187 gmMedium
Width 73.3 mmOk for one-handed use 75.2 mmOk for one-handed use
Audio Output 3.5mm jack 3.5mm jack
Water Resistant
Battery Capacity 4000 mAh 4500 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, 18W Dual-Engine Fast Charging
Included Fast Charger Yes, 20W Fast Charger Yes, 18W 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 In-display Fingerprint Sensor; NFC; 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
  • Jazzy, eye-catching back panel design with gradient finish and the unique diamond-shaped camera module
  • The slim profile of the camera module barely protrudes from the back
  • The in-display fingerprint sensor works well
  • Face unlock is present too, which is reliable (though, not as quick as on the other phones at this price level)
  • Vivid, crisp 6.38-inch full-HD+ Super AMOLED display - the colours are also very punchy thanks to the AMOLED panel, and text and icons are adequately sharp
  • The display gets very bright, making it easily legible even under direct sunlight
  • Widevine L1 DRM certified - you can watch Netflix and Prime in crisp HD resolution
  • Funtouch OS based on Android 9 Pie looks very similar to iOS, and is pretty feature packed
  • Decent performance powered by the Qualcomm Snapdragon 665 - it handles multitasking well and regular usage is smooth
  • Decent set of quad rear cameras - 48MP primary + 8MP ultra-wide + 2MP macro + 2MP depth camera
  • Close-ups are good, with good bokeh and details in objects
  • In bokeh mode, the Vivo S1 Pro's depth camera does a decent job of detecting edges, and blurs out the right areas - colours and details are also good
  • The macro camera is also handy at times, and lets you get very close to the subjects
  • Very good 32MP selfie camera - it captures detailed photos when shooting under ideal light - results are fairly good even when shooting against the light
  • The Vivo S1 Pro packs in a 4500 mAh battery, which easily lasts for 2 days of moderate use
  • Overall, the Vivo S1 Pro is a decent pick if all you want is a stylish design, good battery life, and a punchy display
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 Vivo S1 Pro feels a little chunky at 8.68mm thick
  • The back isn't glass, as Vivo still uses laminated plastic
  • Having said that, the interface is unnecessarily complicated - swipe-up gesture to access system shortcuts is confusing, since it's in the notification shade in stock or other Android UIs
  • There's a lot of bloatware preinstalled on the Vivo S1 Pro (though the third-party apps can be removed)
  • Heavy games such as PUBG Mobile however struggle to run at a smooth frame rate even at the Low graphics preset
  • This isn't a bad processor, but it's typically now found in phones closer to the Rs. 10, 000 mark, such as the Realme 5i
  • In daylight, the primary camera manage to capture average-looking landscape shots - images lack depth, objects at the sides of the frame also have a bit of grain - HDR kicks in when needed, but the end result isn't always very good - some images have a very cool, bluish hue to them, which look unnatural
  • The wide-angle camera offered a nice perspective, but colours weren't very accurate
  • Low-light photos are just strictly average - focusing is a lot slower in the dark, and it takes a second or two longer to save each photo - there's no dedicated night shooting mode either
  • No option for a background bokeh effect with the front camera
  • Videos can only be recorded at up to 1080p, which is not great, especially at this price - there's no stabilisation either, which is a big letdown
  • Low-light video is not very good, from both primary & ultra-wide lens - has lots of grain as well as weak details
  • Overall, rear cameras are nothing special - you will get better outcomes with the Realme X2 or the Redmi K20
  • The single speaker doesn't get too loud and the sound is a little tinny
  • Vivo uses its Dual Engine Fast Charge feature, but the 18W charger isn't the fastest - charging the phone completely takes about two and a half hours
  • If you'd prefer a more well-rounded phone though, we suggest looking at offerings from Realme and Xiaomi instead, such as the Realme X2 and the Redmi K20, which have much more powerful SoCs
Expert Reviews
  1. A good-looking smartphone...but feels underpowered compared to its main rivals
    gadgets.ndtv.com in-depth Read Review »
  2. Considering it as a whole package, the device is a bit overpriced
    fonearena.com in-depth Read Review »
  3. The Oppo F15 has only one thing going for it – design and feel
    bgr.in in-depth Read Review »
  4. The Oppo F15 is a good phone that faces formidable competition, making it just too hard to recommend
    androidauthority.com in-depth Read Review »
  5. Oppo F15 is a good-looking smartphone... but, feels quite under-powered
    indianexpress.com in-depth Read Review »
  6. A decent smartphone for the price, but there's a lot of competition out there
    ibtimes.co.in in-depth Read Review »
  7. 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
    indiatoday.in in-depth Read Review »
  8. Looking at the competition, the Oppo F15 doesn't pack in the right features to stand out
    in.mashable.com in-depth Read Review »
  9. Looks good, has a great battery, but it's no powerhouse
    firstpost.com in-depth Read Review »
  1. Not a bad pick if all you want is a stylish design, good battery life, and a punchy display....If you'd prefer a more well-rounded phone though, we suggest looking at offerings from Realme and Xiaomi instead
    gadgets.ndtv.com in-depth Read Review »
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Official Website Official Website » Official Website »
Unofficial specs? N/A N/A
Individual Review 2
  • Individual Review 2
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