Lava Z91 vs Vivo V9 vs Coolpad Cool M7 comparison

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ratings
Overall NDTV Rating-Read Review-
Design Rating--
Display Rating--
Software Rating--
Performance Rating--
Battery Life Rating--
Camera Rating--
Value for Money Rating--
key specs
Display5.70-inch6.30-inch5.50-inch
Processor1.3GHz quad-core2.2GHz octa-core2GHz octa-core
Front Camera8-megapixel24-megapixel 13-megapixel
Resolution720x1440 pixels1080x2280 pixels1080x1920 pixels
RAM3GB4GB4GB
OSAndroid 7.1 NougatAndroid 8.1Android 7.1.1
Storage32GB64GB64GB
Rear Camera13-megapixel16-megapixel + 5-megapixel12-megapixel
Battery Capacity3000mAh3260mAh3200mAh
general
Release dateMarch 2018March 2018August 2017
Form factorTouchscreenTouchscreen-
Battery capacity (mAh)300032603200
Launched in India-Yes-
Dimensions (mm)-154.80 x 75.00 x 7.90151.10 x 74.30 x 6.90
Weight (g)-150.00152.00
Removable battery-NoNo
Colours-Pearl Black, GoldMatte Black, Blue
SAR value-1.38-
display
Screen size (inches)5.706.305.50
TouchscreenYesYesYes
Resolution720x1440 pixels1080x2280 pixels1080x1920 pixels
Aspect ratio-19:9-
hardware
Processor1.3GHz quad-core2.2GHz octa-core2GHz octa-core
Processor makeMediaTek MTK6739Snapdragon 626Qualcomm Snapdragon 625
RAM3GB4GB4GB
Internal storage32GB64GB64GB
Expandable storageYesYesNo
Expandable storage up to (GB)128256-
Expandable storage type-microSD-
camera
Rear camera13-megapixel16-megapixel (f/2.0) + 5-megapixel12-megapixel
Rear flashYesDual LEDDual LED
Front camera8-megapixel24-megapixel (f/2.0)13-megapixel
Front flashYes--
Rear autofocus-Phase detection autofocus-
software
Operating systemAndroid 7.1 NougatAndroid 8.1Android 7.1.1
SkinStar OS 4.2FunTouch OS 4.0Journey UI
connectivity
Number of SIMs222
Wi-Fi-YesYes
GPS-YesYes
Bluetooth-Yes, v 4.20Yes, v 4.20
USB OTG-YesNo
Micro-USB-Yes-
Headphones-3.5mmYes
FM-YesNo
Wi-Fi standards supported--802.11 ac
NFC--No
Infrared--No
sim 1
SIM Type-Nano-SIM-
GSM/CDMA-GSMGSM
3G-YesYes
4G/ LTE-YesYes
sim 2
SIM Type-Nano-SIM-
GSM/CDMA-GSM-
3G-YesNo
4G/ LTE-YesNo
sensors
Face unlock-Yes-
Fingerprint sensor-Yes-
Compass/ Magnetometer-YesNo
Proximity sensor-YesYes
Accelerometer-YesYes
Ambient light sensor-YesYes
Gyroscope-YesNo
Barometer--No
Temperature sensor--No