Yezz Billy 4 official Pictures. Yezz Billy 4 is a Smartphone of yezz. The Yezz Billy 4 Windows Mobile Smartphone. Announced Jun 2014. Features 4.0″ Display, Snapdragon 200 Chipset, 8 MP Primary Camera, 1.3 MP Front Camera, 1300 MAh Battery, 4 GB Storage, 512 MB RAM. Yezz Billy 4 price starts.