Vivo IQOO U3x official Pictures. Vivo IQOO U3x is a Smartphone of vivo. The Vivo IQOO U3x Android Smartphone. Announced Mar 2021. Features 6.58″ Display, Snapdragon 480 5G Chipset, 5000 MAh Battery, 128 GB Storage, 8 GB RAM. Vivo IQOO U3x price starts.