Vivo Z1 vs Vivo X21 vs Vivo V9 comparison

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ratings
Overall NDTV Rating--
Design Rating--
Display Rating--
Software Rating--
Performance Rating--
Battery Life Rating--
Camera Rating--
Value for Money Rating--
general
Release dateApril 2018March 2018March 2018-
Form factorTouchscreenTouchscreenTouchscreen-
Dimensions (mm)154.81 x 75.03 x 7.89154.50 x 74.80 x 7.40154.80 x 75.00 x 7.90-
Weight (g)149.30156.20150.00-
Battery capacity (mAh)326032003260-
Removable batteryNoNoNo-
ColoursPorcelain Glaze Black, Hyun Screen Red, and Sapphire BlueBlack, GoldPearl Black, Gold-
SAR value--1.38-
display
Screen size (inches)6.266.286.30-
TouchscreenYesYesYes-
Resolution1080x2280 pixels1080x2280 pixels1080x2280 pixels-
hardware
Processor2.2GHz octa-core2.2GHz octa-core2.2GHz octa-core-
Processor makeQualcomm Snapdragon 660Qualcomm Snapdragon 660Snapdragon 626-
RAM4GB6GB4GB-
Internal storage16GB128GB64GB-
Expandable storageYesYesYes-
Expandable storage typemicroSDmicroSDmicroSD-
Expandable storage up to (GB)256256256-
camera
Rear camera13-megapixel12-megapixel16-megapixel-
Rear FlashLEDLEDLED-
Front camera12-megapixel12-megapixel24-megapixel-
software
Operating SystemAndroid 8.1 OreoAndroid 8.1Android 8.1-
SkinFunTouch OSFunTouch 4.0FunTouch OS 4.0-
connectivity
Wi-FiYesYesYes-
Wi-Fi standards supported802.11 b/g/n802.11 a/b/g/n/ac--
GPSYesYesYes-
BluetoothYesYes, v 5.00Yes, v 4.20-
USB OTGYesYesYes-
Number of SIMs222-
NFC-No--
Infrared-No--
Headphones-3.5mm3.5mm-
FM-NoYes-
sensors
Compass/ MagnetometerYesYesYes-
Proximity sensorYesYesYes-
AccelerometerYesYesYes-
GyroscopeYesYesYes-
Ambient light sensor-YesYes-
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-