Gigabyte GSmart Sierra S1 official Pictures. Gigabyte GSmart Sierra S1 is a Smartphone of gigabyte. The Gigabyte GSmart Sierra S1 Android Smartphone. Announced Jun 2013. Features 5.0″ Display, MT6589 Chipset, 13 MP Primary Camera, 2 MP Front Camera, 2000 MAh Battery, 4 GB Storage, 1000 MB RAM. Gigabyte GSmart Sierra S1 price starts.