An XDA user has ported almost all the Sony Xperia Z5 content for the Samsung Galaxy Grand 2 android phone. This includes Xperia Z5 system user interface, home UI, setup wizard, album, music app, video app, clock widgets, semc clock, calendar, keyboard, backup + restore app, clock, photo editor, weather app, care, media sounds, live wallpaper, calculator, Xperia Z5 wallpaper, movie creator and so on.
However, in order to install all that, you will need to install CM12.1 on to your Samsung Galaxy Grand 2 which, fortunately, is not that difficult.
How to install CM12.1 on Samsung Galaxy Grand 2
* Once you are booted in Recovery Select Mount and Storage and format Data, Cache, Dalvik,System and Boot.
* Use the Volume keys and power button to navigate.
* Install the Cm12.1, Gapps. If you want single SIM then flash AOI.zip immediately after flashing Gapps AND install ApeXPeria mod.