Vivo Y91 vs Oppo A3s vs Vivo Y81 vs Xiaomi Redmi 6A comparison

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key specs
Display6.22-inch6.20-inch6.22-inch5.45-inch
ProcessorMediaTek Helio P22 Qualcomm Snapdragon 450MediaTek Helio P22 MediaTek Helio A22
Front Camera8-megapixel 8-megapixel 5-megapixel 5-megapixel
Rear Camera13-megapixel + 2-megapixel 13-megapixel + 2-megapixel 13-megapixel 13-megapixel
RAM2GB2GB3GB2GB
Storage32MB16GB32GB16GB
Battery Capacity4030mAh4230mAh3260mAh3000mAh
OSAndroid 8.1Android 8.1 OreoAndroid 8.1Android 8.1 Oreo
Resolution720x1520 pixels720x1520 pixels720x1520 pixels720x1440 pixels
general
BrandVivoOppoVivoXiaomi
ModelY91A3sY81Redmi 6A
Release dateJanuary 1, 2019-June 1, 2018June 1, 2018
Launched in IndiaYes-YesYes
Form factorTouchscreenTouchscreenTouchscreenTouchscreen
Dimensions (mm)155.11 x 75.09 x 8.28156.20 x 75.60 x 8.20155.06 x 75.00 x 7.77147.50 x 71.50 x 8.30
Weight (g)163.50168.00146.50145.00
Battery capacity (mAh)4030423032603000
ColoursStarry Black, Ocean BlueRed, Dark PurpleBlackBlue, Gold, Rose Gold, Black
Body type--PlasticPlastic
Removable battery---No
Wireless charging---No
display
Screen size (inches)6.226.206.225.45
TouchscreenYesYesYesYes
Resolution720x1520 pixels720x1520 pixels720x1520 pixels720x1440 pixels
Aspect ratio-19:919:918:9
Pixels per inch (PPI)--270295
hardware
Processorocta-core1.8GHz octa-core2GHz octa-core2GHz quad-core (4x2GHz)
Processor makeMediaTek Helio P22 (MT6762R)Qualcomm Snapdragon 450MediaTek Helio P22 (MT6762)MediaTek Helio A22 (MT6761)
RAM2GB2GB3GB2GB
Internal storage32MB16GB32GB16GB
Expandable storageYesYesYesYes
Expandable storage typemicroSDmicroSDmicroSDmicroSD
Expandable storage up to (GB)256256256256
Dedicated microSD slotYes--Yes
camera
Rear camera13-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)13-megapixel (f/2.2)
Rear flashLEDLEDLEDLED
Front camera8-megapixel (f/f/1.8)8-megapixel (f/2.2)5-megapixel (f/2.2)5-megapixel
Front flashNo--No
Rear autofocus-YesPhase detection autofocusPhase detection autofocus
software
Operating systemAndroid 8.1Android 8.1 OreoAndroid 8.1Android 8.1 Oreo
SkinFuntouch OS 4.5ColorOS 5.1FunTouch OS 4.0MIUI 9.6
connectivity
Wi-FiYesYesYesYes
BluetoothYes, v 5.00Yes, v 4.20Yes, v 5.00Yes, v 4.20
NFCNo--No
Micro-USBYesYesYesYes
Headphones3.5mm3.5mm3.5mm3.5mm
Number of SIMs2-22
Active 4G on both SIM cardsYes--Yes
GPS-YesYesYes
Wi-Fi Direct-YesYes-
Wi-Fi standards supported--802.11 b/g/n802.11 b/g/n
Infrared---No
USB OTG---Yes
USB Type-C---No
FM---Yes
sim 1
SIM TypeNano-SIM-Nano-SIMNano-SIM
GSM/CDMAGSM-GSMGSM
3GYes-YesYes
4G/ LTEYes-YesYes
sim 2
SIM TypeNano-SIM-Nano-SIMNano-SIM
GSM/CDMAGSM-GSMGSM
3GYes-YesYes
4G/ LTEYes-YesYes
sensors
Face unlockYes--Yes
Fingerprint sensorYes--No
Compass/ MagnetometerYesYesYesYes
Proximity sensorYesYesYesYes
AccelerometerYesYesYesYes
Ambient light sensorYes--Yes
GyroscopeYes--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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