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Vivo X21s vs Vivo X21i vs Vivo X21 UD comparison

 Compare Vivo X21s
Vivo X21s
Compare Vivo X21i
Vivo X21i
Compare Vivo X21 UD
Vivo X21 UD
key specs
Display6.41-inch6.28-inch6.28-inch
ProcessorQualcomm Snapdragon 660MediaTek Helio P60 Qualcomm Snapdragon 660
Front Camera24.8-megapixel24-megapixel12-megapixel
Rear Camera12-megapixel + 5-megapixel12-megapixel12-megapixel
RAM6GB4GB6GB
Storage128GB64GB128GB
Battery Capacity3400mAh3245mAh3200mAh
OSAndroid 8.1 OreoAndroid 8.1Android 8.1
Resolution1080x2340 pixels1080x2280 pixels1080x2280 pixels
general
BrandVivoVivoVivo
ModelX21sX21iX21 UD
Release dateNovember 1, 2018May 1, 2018March 1, 2018
Form factorTouchscreenTouchscreenTouchscreen
Dimensions (mm)157.91 x 75.08 x 7.90154.37 x 74.98 x 6.99154.50 x 74.80 x 7.40
Weight (g)156.00159.00156.20
Battery capacity (mAh)340032453200
ColoursStarry Night BlackAurora White, Polar Night, Ruby RedRuby Red, Aurora White, Black
display
Screen size (inches)6.416.286.28
TouchscreenYesYesYes
Resolution1080x2340 pixels1080x2280 pixels1080x2280 pixels
Aspect ratio19.5:9--
hardware
Processorocta-core2GHz octa-coreocta-core
Processor makeQualcomm Snapdragon 660MediaTek Helio P60 (MT6771)Qualcomm Snapdragon 660
RAM6GB4GB6GB
Internal storage128GB64GB128GB
Expandable storageYesYes-
Expandable storage typemicroSDmicroSD-
Expandable storage up to (GB)256256-
camera
Rear camera12-megapixel + 5-megapixel12-megapixel12-megapixel
Rear autofocusYes--
Front camera24.8-megapixel24-megapixel12-megapixel
Rear flash-Dual LEDLED
software
Operating systemAndroid 8.1 OreoAndroid 8.1Android 8.1
Skin-Funtouch OS 4FunTouch 4.0
connectivity
Wi-FiYesYesYes
GPSYesYesYes
BluetoothYesYesYes, v 5.00
Micro-USBYes--
Headphones3.5mm-3.5mm
Number of SIMs222
Wi-Fi standards supported-802.11 b/g/n802.11 a/b/g/n/ac
USB OTG-YesYes
FM-Yes-
sim 1
GSM/CDMAGSMGSMGSM
3GYesYesYes
4G/ LTEYesYesYes
SIM Type-Nano-SIMMicro-SIM
sim 2
GSM/CDMAGSMGSMGSM
3GYesYesYes
4G/ LTEYesYesYes
SIM Type-Nano-SIMMicro-SIM
sensors
Face unlockYes--
Fingerprint sensorYes--
Compass/ MagnetometerYes-Yes
Proximity sensorYesYesYes
AccelerometerYesYes-
Ambient light sensorYesYesYes
GyroscopeYesYesYes

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