Vivo X20 Plus UD official Pictures. Vivo X20 Plus UD is a Smartphone of vivo. The Vivo X20 Plus UD Android Smartphone. Announced Jan 2018. Features 6.43″ Display Snapdragon 660 Chipset Dual: 12 MP (f/1.8 AF) + 5 MP Primary Camera 12 MP Front Camera 3900 MAh Battery 128 GB Storage 4 GB RAM. Vivo X20 Plus UD price starts.