hard factory reset to my GT-19060 erased even all the android feature it seems

[AC Question]

I did hard factory reset to my GT-19060 just to erase all the data & apps i downloaded.

But after doing so i find the device showing some childish display as it seems the android has also been lost. I expected that all the features & display look should remain but it isnt the case.

What should i do to get back the displays?