LG Optimus 3D Cube SU870 official Pictures. LG Optimus 3D Cube SU870 is a Smartphone of lg. The LG Optimus 3D Cube SU870 Android Smartphone. Announced Feb 2012. Features 4.3″ Display, Dual: 5 MP Primary Camera, 1520 MAh Battery, 16 GB Storage, 1000 MB RAM. LG Optimus 3D Cube SU870 price starts.