Lava Z40 official Pictures. Lava Z40 is a Smartphone of lava. The Lava Z40 Android Smartphone. Announced Mar 2019. Features 4.0″ Display Unisoc SC9832E Chipset 2250 MAh Battery 8 GB Storage 1000 MB RAM Corning Gorilla Glass (unspecified Version). Lava Z40 price starts.