Go to Settings/Safari
Change your search engine (switch from Google to Yahoo or vise versa)
Launch Safari
Go to Settings/Safari
Clear History, Cookies, and Cache
Change your search engine back to what you had originally
Open the Settings app. You'll be clearing your browsing history from the Settings app, not from the Safari app. ...
Scroll down and tap "Safari." ...
Scroll down in the Safari menu and tap "Clear History and Website Data." ...
Confirm that you want to delete the history.
Open the Settings app. cleare your browsing history from the Settings app. While you can delete your browsing history in Safari, this won't remove any autofill information or cookies. Clearing your history through the Settings app will ensure that everything is deleted.