Compare vivo X21 UD with Apple Iphone 12, Apple Iphone 12 mini, Apple Iphone 12 Pro
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vivo X21 UD 
Apple Watch Series 6 40mm Cellular -
vivo X21 UD 
Apple Watch Series 6 44mm Cellular -
vivo X21 UD 
Apple Watch Series 6 Aluminum 40mm -
vivo X21 UD 
Apple Watch Series 6 Aluminum 40mm Cellular
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