Sony XPERIA Z5 Premium is the most featured Sony Mobile smartphone for 2015. It is the first smartphone with 4K display in the world. Phone also has powerfull octacore Qualcomm Snapdragon 810 CPU, 3 GB RAM or 23 megapixel camera. Sony XPERIA Z5 Premium is also water resistance. Below you can find the latest firmware for the phone and also two tutorials/manuals.