when is secret button of SONY XPERIA Z ULTRA ( C6802 / XL39h / C6833 / C6843 / C6806 ) to reset or reboot

How to Easily Master Format SONY XPERIA Z ULTRA (C6802 / XL39h / C6833 / C6843 / C6806) with Safety Hard Reset?

Tips and solutions for SONY XPERIA Z ULTRA ( C6802  / XL39h / C6833 / C6843 / C6806 ) problems. Having…

55 years ago