Oppo A91 vs Oppo A31 comparison

Compare Oppo A91
Compare Oppo A31
key specs
Display6.40-inch4.50-inch
Processorocta-coreQualcomm Snapdragon 410
Front CameraYes5-megapixel
Rear Camera48-megapixel + 8-megapixel8-megapixel
RAM8GB1GB
Storage128GB8GB
Battery Capacity4000mAh2000mAh
OSAndroid 9Android 4.4
Resolution1080x2400 pixels480x854 pixels
general
BrandOppoOppo
ModelA91A31
Release date20th December 2019April 2015
Form factorTouchscreenTouchscreen
Battery capacity (mAh)40002000
Removable batteryNoNo
Fast chargingVOOC-
ColoursBlack, Blue, Red-
Dimensions (mm)-131.90 x 65.54 x 8.03
Weight (g)-135.00
display
Screen size (inches)6.404.50
TouchscreenYesYes
Resolution1080x2400 pixels480x854 pixels
Protection typeGorilla Glass-
hardware
Processorocta-core1.4GHz quad-core
RAM8GB1GB
Internal storage128GB8GB
Processor make-Qualcomm Snapdragon 410
Expandable storage-Yes
Expandable storage type-microSD
Expandable storage up to (GB)-128
camera
Rear camera48-megapixel + 8-megapixel8-megapixel
Rear autofocusYes-
Rear flashYesLED
Front cameraYes5-megapixel
Front flashNo-
software
Operating systemAndroid 9Android 4.4
SkinColorOSColorOS 2.0.1
connectivity
Wi-FiYesYes
Wi-Fi standards supported802.11 a/b/g/n-
GPSYesYes
BluetoothYesYes
Active 4G on both SIM cardsYes-
NFC-No
Infrared-No
USB OTG-No
Headphones-Yes
FM-No
Number of SIMs-2
Wi-Fi Direct-No
Mobile High-Definition Link (MHL)-No
sensors
Fingerprint sensorYes-
Compass/ MagnetometerYesNo
Proximity sensorYesYes
AccelerometerYesYes
Ambient light sensorYesYes
Gyroscope-No
Barometer-No
Temperature sensor-No
sim 1
SIM Type-Micro-SIM
GSM/CDMA-GSM
3G-Yes
4G/ LTE-Yes
sim 2
SIM Type-Nano-SIM
GSM/CDMA-GSM
3G-No
4G/ LTE-Yes

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