Please change the solution to a real solution, not just a, "let's forget it ever happened and with everything you ever put on the phone" solution. Tripple click the home button. If this does not fix it, go into setting by swiping from the top of the screen down, tap on the gear icon, scroll down to "Accessibility" then look for "Direct access" in this menu it should say how you can enable these assistant features. My particular setting was toggled on, with "Universal switch" as the enabbler/disabler.
... View more