Plum Sync 3.5 official Pictures. Plum Sync 3.5 is a Smartphone of plum. The Plum Sync 3.5 Android Smartphone. Announced Aug 2014. Features 3.5″ Display, MT6572M Chipset, 1.3 MP Primary Camera, 1.3 MP Front Camera, 1350 MAh Battery, 512 MB Storage, 256 MB RAM. Plum Sync 3.5 price starts.