Oppo A3s vs Oppo A71 (2018) vs Oppo A71 comparison

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general
Form factorTouchscreenTouchscreenTouchscreen-
Dimensions (mm)156.20 x 75.60 x 8.20148.10 x 73.80 x 7.60148.10 x 73.80 x 7.60-
Weight (g)168.00137.00137.00-
Battery capacity (mAh)423030003000-
ColoursRed, Dark PurpleBlack, GoldGold, Black-
Release date-January 2018September 2017-
Removable battery--No-
display
Screen size (inches)6.205.205.20-
TouchscreenYesYesYes-
Resolution720x1520 pixels720x1280 pixels720x1280 pixels-
Aspect ratio19:9---
hardware
Processor1.8GHz octa-core1.8GHz octa-core1.5GHz octa-core-
Processor makeSnapdragon 450Qualcomm Snapdragon 450MediaTek MT6750-
RAM2GB2GB3GB-
Internal storage16GB16GB16GB-
Expandable storageYesYesYes-
Expandable storage typemicroSDmicroSDmicroSD-
Expandable storage up to (GB)256256256-
camera
Rear camera13-megapixel (f/2.2) + 2-megapixel (f/2.4)13-megapixel13-megapixel-
Rear autofocusYes---
Rear flashLEDLEDYes-
Front camera8-megapixel (f/2.2)5-megapixel5-megapixel-
software
Operating systemAndroid 8.1 OreoAndroid 7.1Android 7.1-
SkinColorOS 5.1ColorOS 3.2Color OS-
connectivity
Wi-FiYesYesYes-
GPSYes-Yes-
BluetoothYes, v 4.20Yes, v 4.20Yes, v 4.00-
Micro-USBYes---
Headphones3.5mm3.5mm3.5mm-
Wi-Fi standards supported-802.11 b/g/n802.11 b/g/n-
USB OTG-YesYes-
FM-YesNo-
Number of SIMs-22-
NFC--No-
Infrared--No-
sensors
Compass/ MagnetometerYesYesYes-
Proximity sensorYesYesYes-
AccelerometerYesYesYes-
Ambient light sensor-YesYes-
Gyroscope--No-
Barometer--No-
Temperature sensor--No-
sim 1
SIM Type-Nano-SIMNano-SIM-
GSM/CDMA-GSMGSM-
3G-YesYes-
4G/ LTE-YesYes-
sim 2
SIM Type-Nano-SIMNano-SIM-
GSM/CDMA-GSMGSM-
3G-YesYes-
4G/ LTE-YesYes-