Redmi 9 vs Vivo X21 UD comparison

Compare Redmi 9
Compare Vivo X21 UD
ratings
Overall NDTV RatingRead Review-
Design Rating-
Display Rating-
Software Rating-
Performance Rating-
Battery Life Rating-
Camera Rating-
Value for Money Rating-
key specs
Display6.53-inch6.28-inch
ProcessorMediaTek Helio G35Qualcomm Snapdragon 660
Front Camera5-megapixel 12-megapixel
Rear Camera13-megapixel + 2-megapixel 12-megapixel
RAM4GB6GB
Storage64GB128GB
Battery Capacity5000mAh3200mAh
OSAndroid 10Android 8.1
Resolution720x1600 pixels1080x2280 pixels
general
BrandXiaomiVivo
ModelRedmi 9X21 UD
Release dateAugust 27, 2020March 1, 2018
Launched in IndiaYes-
Form factorTouchscreenTouchscreen
Dimensions (mm)164.90 x 77.07 x 9.00154.50 x 74.80 x 7.40
Weight (g)196.00156.20
Battery capacity (mAh)50003200
Fast chargingProprietary-
ColoursCarbon Black, Sporty Orange, Sky BlueRuby Red, Aurora White, Black
display
Screen size (inches)6.536.28
TouchscreenYesYes
Resolution720x1600 pixels1080x2280 pixels
Aspect ratio20:9-
hardware
Processorocta-coreocta-core
Processor makeMediaTek Helio G35Qualcomm Snapdragon 660
RAM4GB6GB
Internal storage64GB128GB
Expandable storageYes-
Expandable storage typemicroSD-
Expandable storage up to (GB)512-
Dedicated microSD slotYes-
camera
Rear camera13-megapixel (f/2.2) + 2-megapixel (f/2.4)12-megapixel
Rear autofocusYes-
Rear flashYesLED
Front camera5-megapixel (f/2.2, 1.12-micron)12-megapixel
software
Operating systemAndroid 10Android 8.1
SkinMIUI 12FunTouch 4.0
connectivity
Wi-FiYesYes
Wi-Fi standards supported802.11 b/g/n802.11 a/b/g/n/ac
GPSYesYes
BluetoothYes, v 5.00Yes, v 5.00
Micro-USBYes-
Headphones3.5mm3.5mm
FMYes-
Number of SIMs22
USB OTG-Yes
sim 1
SIM TypeNano-SIMMicro-SIM
GSM/CDMAGSMGSM
3GYesYes
4G/ LTEYesYes
sim 2
SIM TypeNano-SIMMicro-SIM
GSM/CDMAGSMGSM
3GYesYes
4G/ LTEYesYes
sensors
Face unlockYes-
Fingerprint sensorYes-
Proximity sensorYesYes
AccelerometerYes-
Ambient light sensorYesYes
Compass/ Magnetometer-Yes
Gyroscope-Yes

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