Vivo S1 (China official Pictures. Vivo S1 (China is a Smartphone of vivo. The Vivo S1 (China) Android Smartphone. Announced Mar 2019. Features 6.53″ Display, MT6771 Helio P70 Chipset, 3940 MAh Battery, 128 GB Storage, 6 GB RAM. Vivo S1 (China price starts.