Oppo F9 vs Oppo A3s vs Oppo Find X vs Vivo X21 comparison

Compare Oppo F9
Compare Oppo A3s
Compare Oppo Find X
Compare Vivo X21
ratings
Overall NDTV RatingRead Review-Read ReviewRead Review
Design Rating-
Display Rating-
Software Rating-
Performance Rating-
Battery Life Rating-
Camera Rating-
Value for Money Rating-
key specs
Display6.30-inch6.20-inch6.42-inch6.28-inch
Processor2GHz octa-core1.8GHz octa-core2.5GHz octa-core 2.2GHz octa-core
Front Camera16-megapixel8-megapixel 25-megapixel 12-megapixel
Resolution1080x2340 pixels720x1520 pixels1080x2340 pixels1080x2280 pixels
RAM4GB2GB8GB6GB
OSAndroid OreoAndroid 8.1 OreoAndroid 8.1Android 8.1
Storage64GB16GB256GB128GB
Rear Camera16-megapixel + 2-megapixel 13-megapixel + 2-megapixel 16-megapixel + 20-megapixel 12-megapixel + 5-megapixel
Battery Capacity3500mAh4230mAh3730mAh3200mAh
general
Release dateAugust 2018-June 2018March 2018
Launched in IndiaYes-YesYes
Form factorTouchscreenTouchscreenTouchscreenTouchscreen
Dimensions (mm)156.70 x 74.00 x 7.90156.20 x 75.60 x 8.20156.70 x 74.30 x 9.40154.50 x 74.80 x 7.40
Weight (g)169.00168.00186.00156.20
Battery capacity (mAh)3500423037303200
ColoursSunrise Red, Twilight Blue, Starry PurpleRed, Dark PurpleBordeaux Red, Glacier BlueBlack, Gold
Body type--Glass-
Removable battery--NoNo
Fast charging--VOOCProprietary
display
Screen size (inches)6.306.206.426.28
TouchscreenYesYesYesYes
Resolution1080x2340 pixels720x1520 pixels1080x2340 pixels1080x2280 pixels
Aspect ratio19.5:919:919.5:919:9
Protection type--Gorilla Glass-
hardware
Processor2GHz octa-core1.8GHz octa-core2.5GHz octa-core (4x2.8GHz + 4x1.7GHz)2.2GHz octa-core
Processor makeMediaTek Helio P60Snapdragon 450Snapdragon 845Qualcomm Snapdragon 660
RAM4GB2GB8GB6GB
Internal storage64GB16GB256GB128GB
Expandable storageYesYes-Yes
Expandable storage typemicroSDmicroSD-microSD
Expandable storage up to (GB)256256-256
camera
Rear camera16-megapixel (f/1.8) + 2-megapixel (f/2.4)13-megapixel (f/2.2) + 2-megapixel (f/2.4)16-megapixel (f/2.0, 1.22-micron) + 20-megapixel (f/2.0, 1.0-micron)12-megapixel (f/1.8, 1.4-micron) + 5-megapixel (f/2.4)
Rear flashYesLEDLEDLED
Front camera16-megapixel8-megapixel (f/2.2)25-megapixel (f/2.0)12-megapixel (f/2.0)
Rear autofocus-YesPhase detection autofocusPhase detection autofocus
software
Operating systemAndroid OreoAndroid 8.1 OreoAndroid 8.1Android 8.1
SkinColor OS 5.2ColorOS 5.1Color OS 5.1FunTouch 4.0
connectivity
Wi-FiYesYesYesYes
Wi-Fi standards supported802.11 a/b/g/n/ac-802.11 a/b/g/n/ac802.11 a/b/g/n/ac
GPSYesYesYesYes
Bluetooth4.20Yes, v 4.20Yes, v 5.00Yes, v 5.00
USB OTGYes--Yes
Micro-USBYesYes-Yes
Headphones3.5mm3.5mmNo3.5mm
Number of SIMs2-22
USB Type-C--Yes-
NFC---No
Infrared---No
FM---No
sim 1
SIM TypeNano-SIM-Nano-SIMNano-SIM
GSM/CDMAGSM-GSM + CDMAGSM
3GYes-YesYes
4G/ LTEYes-YesYes
sim 2
SIM TypeNano-SIM-Nano-SIMNano-SIM
GSM/CDMAGSM-GSM + CDMAGSM
3GYes--Yes
4G/ LTEYes--Yes
sensors
Fingerprint sensorYes--Yes
Compass/ MagnetometerYesYesYesYes
Proximity sensorYesYesYesYes
AccelerometerYesYesYesYes
Ambient light sensorYes--Yes
Face unlock--Yes-
Gyroscope--YesYes