Vivo S1 Pro (China official Pictures. Vivo S1 Pro (China is a Smartphone of vivo. The Vivo S1 Pro (China) Android Smartphone. Announced May 2019. Features 6.39″ Display Snapdragon 675 Chipset 3700 MAh Battery 256 GB Storage 8 GB RAM. Vivo S1 Pro (China price starts.