I think i figured out why long press back button wont work for some

[Delirious D]

Ive been reading that some people are having issues getting menu to come up on some apps with the long press back button.

I was having problem locating menu option in IM+.. long press back button just took me back to home screen. where nova prime settings menu came up. so for kicks i disabled nova and went back touch wiz.. tried long press back button in IM+ again AND sure enough a menu bar came up..
so for those having issues it might be the launcher... if you;re not using a longer then im not sure. lol

 

[SpookDroid]

Thanks for the tip! I haven't had issues getting menus to show up on mine, though...but don't use IM+ (do have Nova as my launcher though).