Motorola MOTOSMART MIX XT550 official Pictures. Motorola MOTOSMART MIX XT550 is a Smartphone of motorola. The Motorola MOTOSMART MIX XT550 Android Smartphone. Announced May 2012. Features 4.0″ Display, Snapdragon S1 Chipset, 3.15 MP Primary Camera, 1735 MAh Battery, 512 MB RAM. Motorola MOTOSMART MIX XT550 price starts.