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Oppo A77 vs Vivo Y55s vs Xiaomi Redmi Note 4 comparison

 Compare Oppo A77
Oppo A77
Compare Vivo Y55s
Vivo Y55s
Compare Xiaomi Redmi Note 4
Xiaomi Redmi Note 4
key specs
Display5.50-inch5.20-inch5.50-inch
ProcessorMediaTek MT6750TQualcomm Snapdragon 425Qualcomm Snapdragon 625
Front Camera16-megapixel5-megapixel 5-megapixel
Rear Camera13-megapixel13-megapixel 13-megapixel
RAM4GB3GB4GB
Storage64GB16GB64GB
Battery Capacity3200mAh2730mAh4100mAh
OSAndroid 6.0Android 6.0Android 6.0
Resolution1080x1920 pixels1280x720 pixels1080x1920 pixels
general
BrandOppoVivoXiaomi
ModelA77Y55sRedmi Note 4
Release dateMay 1, 2017February 1, 2017August 1, 2016
Form factorTouchscreenTouchscreenTouchscreen
Weight (g)153.00142.00175.00
Battery capacity (mAh)320027304100
Removable batteryNoNoNo
ColoursGold, Rose GoldGold, Space GreyGold, Grey, Matte Black
Launched in India-YesYes
Dimensions (mm)-147.90 x 72.90 x 7.50151.00 x 76.00 x 8.30
SAR value-1.08-
display
Screen size (inches)5.505.205.50
TouchscreenYesYesYes
Resolution1080x1920 pixels1280x720 pixels1080x1920 pixels
Aspect ratio-16:916:9
Pixels per inch (PPI)-282401
hardware
Processor1.5GHz octa-core1.4GHz quad-core2GHz octa-core
Processor makeMediaTek MT6750TQualcomm Snapdragon 425Qualcomm Snapdragon 625
RAM4GB3GB4GB
Internal storage64GB16GB64GB
Expandable storageYesYesYes
Expandable storage up to (GB)128256128
Expandable storage type-microSDmicroSD
camera
Rear camera13-megapixel13-megapixel (f/2.2)13-megapixel (f/2.0, 1.12-micron)
Rear flashDual LEDLEDDual LED
Front camera16-megapixel5-megapixel (f/2.2)5-megapixel (f/2.0)
Rear autofocus-YesPhase detection autofocus
software
Operating systemAndroid 6.0Android 6.0Android 6.0
SkinColorOS 3.0Funtouch OS 3.0MIUI 8
connectivity
Wi-FiYesYesYes
GPSYesYesYes
BluetoothYesYesYes, v 4.10
NFCNoNoNo
InfraredNoNoYes
USB OTGNoYesYes
Headphones3.5mm3.5mm3.5mm
FMNoYesYes
Number of SIMs222
Wi-Fi DirectNoNoNo
Mobile High-Definition Link (MHL)NoNoNo
Micro-USB-YesYes
Wi-Fi standards supported--802.11 a/b/g/n
sim 1
SIM TypeNano-SIMMicro-SIMMicro-SIM
GSM/CDMAGSMGSMGSM
3GYesYesYes
4G/ LTEYesYesYes
sim 2
SIM TypeNano-SIM-Nano-SIM
GSM/CDMAGSM-GSM
3GYesNoYes
4G/ LTEYesNoYes
sensors
Compass/ MagnetometerNoYesYes
Proximity sensorYesYesYes
AccelerometerYesYesYes
Ambient light sensorYesYesYes
GyroscopeNoYesYes
BarometerNoNoNo
Temperature sensorNoNoNo
Fingerprint sensor--Yes
ratings
Overall NDTV Rating-Read ReviewRead Review
Design Rating-
Display Rating-
Software Rating-
Performance Rating-
Battery Life Rating-
Camera Rating-
Value for Money Rating-
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