ASUS Zenfone 2 has been able to maintain its popularity by supporting a wide array of devices and offering many customization options. One such customization option is its “Theme Engine” functionality. It offers the ability to install themes in the form of simple apps, then apply the theme from Themes Manager. These themes are very far-reaching, too. They can change the look of almost everything on your phone—from notification panel to app icons.
How To Install Theme Manager
Open Quick Boot tap on Reboot Recovery