Our Opinion

The Xiaomi Redmi K20 (64GB) is a significantly better phone than the Oppo F15 (8GB RAM), and is also slightly better value for money. What should you buy? Go for the Xiaomi Redmi K20 (64GB)!

Oppo F15 (8GB RAM)  Xiaomi Redmi K20 (64GB) 
Oppo F15 Xiaomi Redmi K20
Buy Now Buy Buy
Excellence Score
38.1
46.2
Value for Money Score
68.2
72.2
Price ₹ 17,990 onwards ₹ 17,994 onwards
Launch Date (India) Jan, 2020 Jul, 2019
Expected Launch Date N/A N/A
Smartphone OS Android 9.0 Pie, Upgradeable to 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 6.4 inches 6.39 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 5
Display Type AMOLED AMOLED
Screen Refresh Rate 60 HzStandard 60 HzStandard
Display Features N/A HDR, Always-On Display
Full Physical QWERTY Keypad
Processor 2.1 GHz 2.2 GHz
Processor Type Octa Core Octa Core
Processor Name MediaTek Helio P70Ranked #51 in Mobile Processor Benchmarks Qualcomm Snapdragon 730Ranked #23 in Mobile Processor Benchmarks
GPU Mali-G72 MP3 Adreno 618
RAM 8 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 + 8MP + 2MP + 2MP 48MP + 13MP + 8MP
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/1.75 Aperture; 26mm Focal Length (wide); 1/2" Sensor Size; 1.6um Pixel Size, 13MP: F/2.4 Aperture; 12mm Focal Length (Ultrawide); 1/3" Sensor Size; 1.12um Pixel Size; 124.8° Wide-angle lens, 8MP: F/2.4 Aperture; 53mm Focal Length (telephoto); 1/4" Sensor Size; 1.12um Pixel Size; 2x Optical Zoom, PDAF, HDR, Panorama, Portrait mode, Night More, Video: [email protected]; [email protected]/60/120fps; [email protected]/240/960fps
Secondary Camera 16MP 20MP
Secondary Camera Features f/2.0 Aperture, 26mm Focal Length, 1/3.1" Sensor Size, 1.0um Pixel Size, HDR Motorized Pop-up Camera, F/2.2 Aperture, 0.8um Pixel Size, HDR
Internal Memory 128 GB 64 GB
Expandable Memory Slot 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
Thickness 7.9 mmMedium 8.8 mmMedium
Weight 172 gmMedium 191 gmHeavy
Width 73.3 mmOk for one-handed use 74.3 mmOk for one-handed use
Audio Output 3.5mm jack 3.5mm jack
Water Resistant
Battery Capacity 4000 mAh 4000 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 Quick Charge 3.0
Included Fast Charger Yes, 20.0W Fast Charger Yes, 18.0W 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 In-display fingerprint sensor; Noise Filtration; Game Turbo 2.0; Hi-Fi DAC Audio; Hi-Res Audio
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
  • Xiaomi has gone big on the design front this time - the Redmi K20 has a glass back with one of the most evocative gradient patterns you'll come across on any phone today - it's both premium to feel, and stunning to look at
  • The gradient effect that kicks in under the right lighting condition is quite mesmerising
  • The front is modern and sharp too, with a 'full screen' notch-less display (the selfie camera is a 'popup' one)
  • Decent in-screen fingerprint sensor - reasonably quick and reliable
  • Excellent 6.39" AMOLED display - high brightness, HDR10, and notch-free
  • MIUI is one of the most refined and fluid Android UIs around
  • The K20 also adds the POCO Launcher on top of MIUI - which brings the Dark Mode and App drawer to the K20
  • Excellent, butter smooth performance backed by the new, powerful Snapdragon 730 (very similar in overall performance to last year's flagship Snapdragon 845, and a step above the Snapdragon 710) - everything from daily use to games is butter smooth, as expected
  • Great all-round camera experience on all three rear snappers, photo and video
  • Decent selfies too, from the pop-up front camera
  • Overall, this is now the best camera phone in the under Rs 25k price bracket - the overall quality and versatility you get are a notch above what the competition offers
  • Has a 3.5mm jack, that a lot of flagships these days tend to skimp on
  • Loud (single) downward firing speaker
  • Great battery life, with a 4000mAh battery and a very power efficient chip - you can get up to 2 days of use, from this beast
  • Fast charging support - the supplied 18W charger fills 45% of a depleted battery in 30 mins - a full charge takes about 100 mins
  • The K20 is an excellent 'close to Flagship level' device from Xiaomi that seems set to disrupt the mid-range market in India - along with the new Realme X, it offers an excellent high-end, modern experience, at a relatively low price - all ingredients of a likely blockbuster hit
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
  • Face unlock mechanism is a little clunky - you have to first wake the screen and swipe up for the camera module to engage (this might get sorted via a software update though)
  • One issue with MIUI in recent times is the ads in the interface - those are still there (though a little less intrusive) - and while there are ways to disable them, it's a technical solution that a lot of prospective buyers will not even be aware of
  • The pop-up selfie camera mechanism is a bit on the slow side
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. A very balanced smartphone that excels in almost everything...Given the chance, we're sure it's a phone which will delight you, so it earns our recommendation
    gsmarena.com in-depth Read Review »
  2. The most heavily specced and feature-laden ‘non-flagship' phone...none of the alternatives can compete with the overall value offered by the K20
    gadgets.ndtv.com in-depth Read Review »
  3. Value-for-money phone
    fonearena.com in-depth Read Review »
  4. Impeccable...looks like another success story for Xiaomi
    bgr.in in-depth Read Review »
  5. Excellently balanced ...the best mid-range smartphone on the planet
    androidauthority.com in-depth Read Review »
  6. If you can afford it, get the Redmi K20...it shines in many areas
    indianexpress.com in-depth Read Review »
  7. One of the best smartphones under Rs 25,000
    hindustantimes.com in-depth Read Review »
  8. There are some really capable phones that you can choose from if you have a budget of around Rs 20,000....but all things considered, we would say that the Redmi K20 should sit at the top of the shortlist
    news18.com in-depth Read Review »
  9. For buyers looking for a new smartphone in the vicinity of ₹20,000, Redmi K20 has a plenty to offer with very few equals
    livemint.com in-depth Read Review »
  10. A sweet deal...offers great value at its price
    indiatoday.in in-depth Read Review »
  11. themobileindian.com in-depth Read Review »
User Reviews
  1. Flipkart4.4 1,361+ reviews »
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Official Website Official Website » Official Website »
Unofficial specs? N/A N/A
Individual Review 2
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