BLU S1 official Pictures. BLU S1 is a Smartphone of blu. The BLU S1 Android Smartphone. Announced Sep 2017. Features 5.2″ Display, MT6750 Chipset, 13 MP Primary Camera, 5 MP Front Camera, 2800 MAh Battery, 16 GB Storage, 2 GB RAM. BLU S1 price starts.