I didn't know what TouchWiz was, and it asked a question, something about TouchWiz, and I said, just once or something My phone answered back, go to settings, Applications, defaults, Applications & Clear. Then I went on my Desk top and googled TouchWiz and found out that it was the was Samsung S5 interface or something. My phone had just updated to lolli pop and now I don't have TouchWiz, I am wondring if I need it?