Asus Zenfone Zoom ZX550 official Pictures. Asus Zenfone Zoom ZX550 is a Smartphone of asus. The Asus Zenfone Zoom ZX550 Android Smartphone. Announced Jan 2015. Features 5.5″ Display, Intel Atom Z3580 Chipset, 13 MP Primary Camera, 5 MP Front Camera, 3000 MAh Battery, 128 GB Storage, 4 GB RAM, Corning Gorilla Glass 3. Asus Zenfone Zoom ZX550 price starts.