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Vivo X21 vs Xiaomi Redmi Note 4 comparison

 Compare Vivo X21
Vivo X21
Compare Xiaomi Redmi Note 4
Xiaomi Redmi Note 4
ratings
Overall NDTV RatingRead ReviewRead Review
Design Rating
Display Rating
Software Rating
Performance Rating
Battery Life Rating
Camera Rating
Value for Money Rating
key specs
Display6.28-inch5.50-inch
ProcessorQualcomm Snapdragon 660Qualcomm Snapdragon 625
Front Camera12-megapixel 5-megapixel
Rear Camera12-megapixel + 5-megapixel 13-megapixel
RAM6GB4GB
Storage128GB64GB
Battery Capacity3200mAh4100mAh
OSAndroid 8.1Android 6.0
Resolution1080x2280 pixels1080x1920 pixels
general
BrandVivoXiaomi
ModelX21Redmi Note 4
Release dateMarch 1, 2018August 1, 2016
Launched in IndiaYesYes
Form factorTouchscreenTouchscreen
Dimensions (mm)154.50 x 74.80 x 7.40151.00 x 76.00 x 8.30
Weight (g)156.20175.00
Battery capacity (mAh)32004100
Removable batteryNoNo
Fast chargingProprietary-
ColoursBlack, GoldGold, Grey, Matte Black
display
Screen size (inches)6.285.50
TouchscreenYesYes
Resolution1080x2280 pixels1080x1920 pixels
Aspect ratio19:916:9
Pixels per inch (PPI)-401
hardware
Processor2.2GHz octa-core2GHz octa-core
Processor makeQualcomm Snapdragon 660Qualcomm Snapdragon 625
RAM6GB4GB
Internal storage128GB64GB
Expandable storageYesYes
Expandable storage typemicroSDmicroSD
Expandable storage up to (GB)256128
camera
Rear camera12-megapixel (f/1.8, 1.4-micron) + 5-megapixel (f/2.4)13-megapixel (f/2.0, 1.12-micron)
Rear autofocusPhase detection autofocusPhase detection autofocus
Rear flashLEDDual LED
Front camera12-megapixel (f/2.0)5-megapixel (f/2.0)
software
Operating systemAndroid 8.1Android 6.0
SkinFunTouch 4.0MIUI 8
connectivity
Wi-FiYesYes
Wi-Fi standards supported802.11 a/b/g/n/ac802.11 a/b/g/n
GPSYesYes
BluetoothYes, v 5.00Yes, v 4.10
NFCNoNo
InfraredNoYes
USB OTGYesYes
Micro-USBYesYes
Headphones3.5mm3.5mm
FMNoYes
Number of SIMs22
Wi-Fi Direct-No
Mobile High-Definition Link (MHL)-No
sim 1
SIM TypeNano-SIMMicro-SIM
GSM/CDMAGSMGSM
3GYesYes
4G/ LTEYesYes
sim 2
SIM TypeNano-SIMNano-SIM
GSM/CDMAGSMGSM
3GYesYes
4G/ LTEYesYes
sensors
Fingerprint sensorYesYes
Compass/ MagnetometerYesYes
Proximity sensorYesYes
AccelerometerYesYes
Ambient light sensorYesYes
GyroscopeYesYes
Barometer-No
Temperature sensor-No
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