Asus Zenfone 2 ZE550ML official Pictures. Asus Zenfone 2 ZE550ML is a Smartphone of asus. The Asus Zenfone 2 ZE550ML Android Smartphone. Announced Mar 2015. Features 5.5″ Display, Intel Atom Z3560 Chipset, 13 MP Primary Camera, 5 MP Front Camera, 3000 MAh Battery, 16 GB Storage, 2 GB RAM, Corning Gorilla Glass 3. Asus Zenfone 2 ZE550ML price starts.