First of all those buttons shouldn't be up there to begin with. They're too far away from the fingers of most users to tap comfortably one-handed after Apple moved up to 4" screens and larger. Android has it in the right position though that back button has other problems I won't go into here right now. The "action" button(s) on the top right suffer from the same problem.
I would always put information on the top and buttons in the bottom half. Unless it's stuff that's totally out of the normal flow of usage like a help button or a feedback form.
I would always put information on the top and buttons in the bottom half. Unless it's stuff that's totally out of the normal flow of usage like a help button or a feedback form.
That's the real fix of that problem.