Asus zenfone zoom Zx550 is best mobile of asus brand.Ram is 4gb intel atom z3580.and battery 3000 mAh is very good battery option.screen size is 5.5 inches.Camera is very very good.these include a 5.5 inches 1080p IPS display an atom Z3560 processor with PowerVR G6430 graphics.4gb of ram.
This is the first smaetphone to pack this much ram,
A 3000 mAh battery, LTE and Wi-Fi 802.11ac a front facing 5MP camera.Asua zenfone zoom is best phone.and processor is 2.5GHz.