Oppo A3s vs Vivo Y81 vs Vivo Y83 comparison

Compare Oppo A3s
Compare Vivo Y81
Compare Vivo Y83
general
Form factorTouchscreenTouchscreenTouchscreen-
Dimensions (mm)156.20 x 75.60 x 8.20155.06 x 75.00 x 7.77155.21 x 75.24 x 7.70-
Weight (g)168.00146.50150.00-
Battery capacity (mAh)423032603260-
ColoursRed, Dark PurpleBlackAurora white, Polar Black and CharmRed-
Release date-June 2018May 2018-
Launched in India-YesYes-
Body type-Plastic--
display
Screen size (inches)6.206.226.22-
TouchscreenYesYesYes-
Resolution720x1520 pixels720x1520 pixels720x1520 pixels-
Aspect ratio19:919:919:9-
Pixels per inch (PPI)-270270-
hardware
Processor1.8GHz octa-core2GHz octa-core2GHz octa-core-
Processor makeSnapdragon 450MediaTek MT6762MediaTek Helio P22-
RAM2GB3GB4GB-
Internal storage16GB32GB64GB-
Expandable storageYesYesYes-
Expandable storage typemicroSDmicroSDmicroSD-
Expandable storage up to (GB)256256256-
camera
Rear camera13-megapixel (f/2.2) + 2-megapixel (f/2.4)13-megapixel (f/2.2)13-megapixel (f/2.2)-
Rear autofocusYesPhase detection autofocusPhase detection autofocus-
Rear flashLEDLEDLED-
Front camera8-megapixel (f/2.2)5-megapixel (f/2.2)8-megapixel (f/2.2)-
software
Operating systemAndroid 8.1 OreoAndroid 8.1Android 8.0-
SkinColorOS 5.1FunTouch OS 4.0FunTouch OS 4.0-
connectivity
Wi-FiYesYesYes-
GPSYesYesYes-
BluetoothYes, v 4.20Yes, v 5.00Yes-
Micro-USBYesYesYes-
Headphones3.5mm3.5mm--
Wi-Fi standards supported-802.11 b/g/n--
Number of SIMs-22-
USB OTG--Yes-
FM--Yes-
sensors
Compass/ MagnetometerYesYes--
Proximity sensorYesYesYes-
AccelerometerYesYes--
Face unlock--Yes-
Fingerprint sensor--Yes-
Ambient light sensor--Yes-
Gyroscope--Yes-
sim 1
SIM Type-Nano-SIMNano-SIM-
GSM/CDMA-GSMGSM + CDMA-
3G-YesYes-
4G/ LTE-YesYes-
sim 2
SIM Type-Nano-SIMNano-SIM-
GSM/CDMA-GSMGSM + CDMA-
3G-YesYes-
4G/ LTE-YesYes-