Motorola MILESTONE 3 XT860 official Pictures. Motorola MILESTONE 3 XT860 is a Smartphone of motorola. The Motorola MILESTONE 3 XT860 Android Smartphone. Announced Aug 2011. Features 4.0″ Display, TI OMAP 4430 Chipset, 8 MP Primary Camera, 1540 MAh Battery, 16 GB Storage, 512 MB RAM, Corning Gorilla Glass. Motorola MILESTONE 3 XT860 price starts.