Startup Idea : Smartphone with FUNCTION KEY for One Touch Call

Now: Smartphones are without function keys..You must unlock screen, search for Contact, and then make a call... Idea: there should be on the phone corner/Back some (at least 2-4 ) function key buttons (click, 2-click, hold...event) And you can assign an application/Phone Contact to the event + screen locked/ unlocked , optional ignore locked screen Usage: One Touch Call with LOCKED screen... just press F/KEY for 3 seconds...and make call, change profile, take a shot, start recording...superfast action/call