Lo pone en Xda, es una stock sony, pero el le ha cambiado las apps basicas por la de google, poquito mas
"That means allmost all Sony APP's are removed and replaced by Google APP's (E.g. Google Setup Wizard,Clock,Calender,Calculator and many others!). Witout breaking any Basics of Sony Stock Enhancements like the Camera extensions, Stamina Mode, Screen Recording or the Stock Customization options like Xperia Themes."