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Vivo Y51A vs Vivo X21 UD comparison

 Compare Vivo Y51A
Vivo Y51A
Compare Vivo X21 UD
Vivo X21 UD
key specs
Display6.58-inch6.28-inch
ProcessorQualcomm Snapdragon 662Qualcomm Snapdragon 660
Front Camera16-megapixel 12-megapixel
Rear Camera48-megapixel + 8-megapixel + 2-megapixel 12-megapixel
RAM6GB, 8GB6GB
Storage128GB128GB
Battery Capacity5000mAh3200mAh
OSAndroid 11Android 8.1
Resolution1080x2048 pixels1080x2280 pixels
general
BrandVivoVivo
ModelY51AX21 UD
Release dateJanuary 11, 2021March 1, 2018
Launched in IndiaYes-
Form factorTouchscreenTouchscreen
Dimensions (mm)163.86 x 75.32 x 8.38154.50 x 74.80 x 7.40
Weight (g)188.00156.20
Battery capacity (mAh)50003200
Fast chargingProprietary-
ColoursTitanium Sapphire, Crystal SymphonyRuby Red, Aurora White, Black
display
Screen size (inches)6.586.28
TouchscreenYesYes
Resolution1080x2048 pixels1080x2280 pixels
hardware
Processorocta-coreocta-core
Processor makeQualcomm Snapdragon 662Qualcomm Snapdragon 660
RAM6GB, 8GB6GB
Internal storage128GB128GB
Expandable storageYes-
Expandable storage typemicroSD-
Expandable storage up to (GB)1000-
Dedicated microSD slotYes-
camera
Rear camera48-megapixel (f/1.79) + 8-megapixel (f/2.2) + 2-megapixel (f/2.4)12-megapixel
Rear flashYesLED
Front camera16-megapixel (f/2.0)12-megapixel
software
Operating systemAndroid 11Android 8.1
SkinFuntouch OS 11FunTouch 4.0
connectivity
Wi-FiYesYes
GPSYesYes
BluetoothYes, v 5.00Yes, v 5.00
USB Type-CYes-
FMYes-
Number of SIMs22
Wi-Fi standards supported-802.11 a/b/g/n/ac
USB OTG-Yes
Headphones-3.5mm
sim 1
SIM TypeNano-SIMMicro-SIM
GSM/CDMAGSMGSM
3GYesYes
4G/ LTEYesYes
sim 2
SIM TypeNano-SIMMicro-SIM
GSM/CDMAGSMGSM
3GYesYes
4G/ LTEYesYes
sensors
Fingerprint sensorYes-
Compass/ MagnetometerYesYes
Proximity sensorYesYes
AccelerometerYes-
Ambient light sensorYesYes
GyroscopeYesYes

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