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Vivo Y91i vs Vivo Y91 vs Oppo A3s vs Oppo A57 comparison

 Compare Vivo Y91i
Vivo Y91i
Compare Vivo Y91
Vivo Y91
Compare Oppo A3s
Oppo A3s
Compare Oppo A57
Oppo A57
key specs
Display6.22-inch6.22-inch6.20-inch5.20-inch
ProcessorMediaTek Helio P22 MediaTek Helio P22 Qualcomm Snapdragon 450Qualcomm Snapdragon 435
Front Camera5-megapixel 8-megapixel 8-megapixel 16-megapixel
Rear Camera13-megapixel 13-megapixel + 2-megapixel 13-megapixel + 2-megapixel 13-megapixel
RAM2GB2GB2GB3GB
Storage16GB32MB16GB32GB
Battery Capacity4030mAh4030mAh4230mAh2900mAh
OSAndroid 8.1Android 8.1Android 8.1 OreoAndroid 6.0
Resolution720x1520 pixels720x1520 pixels720x1520 pixels720x1280 pixels
general
BrandVivoVivoOppoOppo
ModelY91iY91A3sA57
Release dateMarch 1, 2019January 1, 2019-November 1, 2016
Launched in IndiaYesYes-Yes
Form factorTouchscreenTouchscreenTouchscreenTouchscreen
Dimensions (mm)155.11 x 75.09 x 8.28155.11 x 75.09 x 8.28156.20 x 75.60 x 8.20149.10 x 72.90 x 7.65
Weight (g)163.50163.50168.00147.00
Battery capacity (mAh)4030403042302900
ColoursFusion Black, Ocean BlueStarry Black, Ocean BlueRed, Dark PurpleRose Gold, Gold
Removable battery---No
SAR value---1.31
display
Screen size (inches)6.226.226.205.20
TouchscreenYesYesYesYes
Resolution720x1520 pixels720x1520 pixels720x1520 pixels720x1280 pixels
Aspect ratio19:9-19:916:9
hardware
Processorocta-coreocta-core1.8GHz octa-core1.4GHz octa-core
Processor makeMediaTek Helio P22 (MT6762)MediaTek Helio P22 (MT6762R)Qualcomm Snapdragon 450Qualcomm Snapdragon 435
RAM2GB2GB2GB3GB
Internal storage16GB32MB16GB32GB
Expandable storageYesYesYesYes
Expandable storage typemicroSDmicroSDmicroSDmicroSD
Expandable storage up to (GB)-256256256
Dedicated microSD slot-Yes--
camera
Rear camera13-megapixel (f/2.2)13-megapixel (f/f/2.2) + 2-megapixel (f/f/2.4)13-megapixel (f/2.2) + 2-megapixel (f/2.4)13-megapixel (f/2.2)
Rear autofocusYes-YesPhase detection autofocus
Rear flashYesLEDLEDLED
Front camera5-megapixel (f/1.8)8-megapixel (f/f/1.8)8-megapixel (f/2.2)16-megapixel (f/2.0, 1.12-micron)
Front flash-No--
Front autofocus---Yes
software
Operating systemAndroid 8.1Android 8.1Android 8.1 OreoAndroid 6.0
SkinFuntouch OS 4.5Funtouch OS 4.5ColorOS 5.1ColorOS 3.0
connectivity
Wi-FiYesYesYesYes
GPSYes-YesYes
BluetoothYes, v 5.00Yes, v 5.00Yes, v 4.20Yes, v 4.10
USB OTGYes--Yes
Micro-USBYesYesYesYes
Headphones3.5mm3.5mm3.5mm3.5mm
FMYes--Yes
Number of SIMs22-2
NFC-No-No
Active 4G on both SIM cards-Yes--
Wi-Fi Direct--YesNo
Wi-Fi standards supported---802.11 b/g/n
Infrared---No
Mobile High-Definition Link (MHL)---No
sim 1
SIM TypeNano-SIMNano-SIM-Nano-SIM
GSM/CDMAGSMGSM-GSM
3GYesYes-Yes
4G/ LTEYesYes-Yes
sim 2
SIM TypeNano-SIMNano-SIM-Nano-SIM
GSM/CDMAGSMGSM-GSM
3GYesYes-Yes
4G/ LTEYesYes-Yes
sensors
Face unlockYesYes--
Fingerprint sensorNoYes-Yes
Compass/ MagnetometerYesYesYesYes
Proximity sensorYesYesYesYes
AccelerometerYesYesYesYes
Ambient light sensorYesYes-Yes
GyroscopeYesYes-Yes
Barometer---No
Temperature sensor---No
ratings
Overall NDTV Rating---Read Review
Design Rating---
Display Rating---
Software Rating---
Performance Rating---
Battery Life Rating---
Camera Rating---
Value for Money Rating---

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