Why my softkeys arent functioning after the update?

[AC Question]

I did lots of resets like factory and install some programs to get my softkeys back as well as kies and etc. but still nothing happens. I guess android is trying to imitate iphone's absence of softkeys just the menu tab.for us its not that easy to change when we get used to use those softkeys. Give us an immediate answers and solutions asap! Thank you.