BLU Tank Xtreme 4.0 official Pictures. BLU Tank Xtreme 4.0 is a Smartphone of blu. The BLU Tank Xtreme 4.0 Android Smartphone. Announced Jan 2017. Features 4.0″ Display, MT6580 Chipset, 3.15 MP Primary Camera, 2 MP Front Camera, 2800 MAh Battery, 4 GB Storage, 512 MB RAM, IP65 Certified. BLU Tank Xtreme 4.0 price starts.