Spice Mi-356 Smart Flo Mettle 3.5X official Pictures. Spice Mi-356 Smart Flo Mettle 3.5X is a Smartphone of spice. The Spice Mi-356 Smart Flo Mettle 3.5X Android Smartphone. Announced Jan 2014. Features 3.5″ Display, 2 MP Primary Camera, 1.3 MP Front Camera, 1500 MAh Battery. Spice Mi-356 Smart Flo Mettle 3.5X price starts.