BLU Advance L4 official Pictures. BLU Advance L4 is a Smartphone of blu. The BLU Advance L4 Android Smartphone. Announced Sep 2018. Features 4.0″ Display, 5 MP Primary Camera, 2 MP Front Camera, 1300 MAh Battery, 8 GB Storage, 512 MB RAM. BLU Advance L4 price starts.