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Vivo X21s vs Vivo X21i vs Vivo X21 UD vs Vivo X21 comparison

 Compare Vivo X21s
Vivo X21s
Compare Vivo X21i
Vivo X21i
Compare Vivo X21 UD
Vivo X21 UD
Compare Vivo X21
Vivo X21
key specs
Display6.41-inch6.28-inch6.28-inch6.28-inch
ProcessorQualcomm Snapdragon 660MediaTek Helio P60 Qualcomm Snapdragon 660Qualcomm Snapdragon 660
Front Camera24.8-megapixel24-megapixel12-megapixel12-megapixel
Rear Camera12-megapixel + 5-megapixel12-megapixel12-megapixel12-megapixel + 5-megapixel
RAM6GB4GB6GB6GB
Storage128GB64GB128GB128GB
Battery Capacity3400mAh3245mAh3200mAh3200mAh
OSAndroid 8.1 OreoAndroid 8.1Android 8.1Android 8.1
Resolution1080x2340 pixels1080x2280 pixels1080x2280 pixels1080x2280 pixels
general
BrandVivoVivoVivoVivo
ModelX21sX21iX21 UDX21
Release dateNovember 1, 2018May 1, 2018March 1, 2018March 1, 2018
Form factorTouchscreenTouchscreenTouchscreenTouchscreen
Dimensions (mm)157.91 x 75.08 x 7.90154.37 x 74.98 x 6.99154.50 x 74.80 x 7.40154.50 x 74.80 x 7.40
Weight (g)156.00159.00156.20156.20
Battery capacity (mAh)3400324532003200
ColoursStarry Night BlackAurora White, Polar Night, Ruby RedRuby Red, Aurora White, BlackBlack, Gold
Launched in India---Yes
Removable battery---No
Fast charging---Proprietary
display
Screen size (inches)6.416.286.286.28
TouchscreenYesYesYesYes
Resolution1080x2340 pixels1080x2280 pixels1080x2280 pixels1080x2280 pixels
Aspect ratio19.5:9--19:9
hardware
Processorocta-core2GHz octa-coreocta-core2.2GHz octa-core
Processor makeQualcomm Snapdragon 660MediaTek Helio P60 (MT6771)Qualcomm Snapdragon 660Qualcomm Snapdragon 660
RAM6GB4GB6GB6GB
Internal storage128GB64GB128GB128GB
Expandable storageYesYes-Yes
Expandable storage typemicroSDmicroSD-microSD
Expandable storage up to (GB)256256-256
camera
Rear camera12-megapixel + 5-megapixel12-megapixel12-megapixel12-megapixel (f/1.8, 1.4-micron) + 5-megapixel (f/2.4)
Rear autofocusYes--Phase detection autofocus
Front camera24.8-megapixel24-megapixel12-megapixel12-megapixel (f/2.0)
Rear flash-Dual LEDLEDLED
software
Operating systemAndroid 8.1 OreoAndroid 8.1Android 8.1Android 8.1
Skin-Funtouch OS 4FunTouch 4.0FunTouch 4.0
connectivity
Wi-FiYesYesYesYes
GPSYesYesYesYes
BluetoothYesYesYes, v 5.00Yes, v 5.00
Micro-USBYes--Yes
Headphones3.5mm-3.5mm3.5mm
Number of SIMs2222
Wi-Fi standards supported-802.11 b/g/n802.11 a/b/g/n/ac802.11 a/b/g/n/ac
USB OTG-YesYesYes
FM-Yes-No
NFC---No
Infrared---No
sim 1
GSM/CDMAGSMGSMGSMGSM
3GYesYesYesYes
4G/ LTEYesYesYesYes
SIM Type-Nano-SIMMicro-SIMNano-SIM
sim 2
GSM/CDMAGSMGSMGSMGSM
3GYesYesYesYes
4G/ LTEYesYesYesYes
SIM Type-Nano-SIMMicro-SIMNano-SIM
sensors
Face unlockYes---
Fingerprint sensorYes--Yes
Compass/ MagnetometerYes-YesYes
Proximity sensorYesYesYesYes
AccelerometerYesYes-Yes
Ambient light sensorYesYesYesYes
GyroscopeYesYesYesYes
ratings
Overall NDTV Rating---Read Review
Design Rating---
Display Rating---
Software Rating---
Performance Rating---
Battery Life Rating---
Camera Rating---
Value for Money Rating---

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