Asus Zenfone Zoom ZX551ML official Pictures. Asus Zenfone Zoom ZX551ML is a Smartphone of asus. The Asus Zenfone Zoom ZX551ML Android Smartphone. Announced Sep 2015. Features 5.5″ Display, Intel Atom Z3590 Chipset, 13 MP Primary Camera, 5 MP Front Camera, 3000 MAh Battery, 128 GB Storage, 4 GB RAM, Corning Gorilla Glass 4. Asus Zenfone Zoom ZX551ML price starts.