Plum Optimax 7.0 official Pictures. Plum Optimax 7.0 is a Smartphone of plum. The Plum Optimax 7.0 Android Tablet. Announced Mar 2016. Features 7.0″ Display, MT8321 Chipset, 5 MP Primary Camera, 2 MP Front Camera, 2800 MAh Battery, 8 GB Storage, 1000 MB RAM. Plum Optimax 7.0 price starts.