Celkon Millennia OCTA510 official Pictures. Celkon Millennia OCTA510 is a Smartphone of celkon. The Celkon Millennia OCTA510 Android Smartphone. Announced Jan 2015. Features 5.0″ Display, MT6592M Chipset, 8 MP Primary Camera, 3.15 MP Front Camera, 2000 MAh Battery, 8 GB Storage, 1000 MB RAM. Celkon Millennia OCTA510 price starts.