LG Optimus Big LU6800 official Pictures. LG Optimus Big LU6800 is a Smartphone of lg. The LG Optimus Big LU6800 Android Smartphone. Announced Apr 2011. Features 4.3″ Display, TI OMAP 3630 Chipset, 5 MP Primary Camera, 1500 MAh Battery, 16 GB Storage, Corning Gorilla Glass. LG Optimus Big LU6800 price starts.