I've never understood people that say they can't reach the top of their phone..?!
I'm guessing you are one of the hundreds of people who hold the phone with 3 fingers on the back, your pinky finger at the bottom (the base of the phone, where the speakers are, rest on your pinky) and with your thumb, hovering over the screen, ready to navigate. Well, of course, in this position, then it is extremely difficult to reach the top of the display as your thumb, physically does not reach up there......
However.....
I have taught myself to hold the phone differently - with ALL four fingers, against the back of the phone (the phone rests at a 45 degree angle on the four fingers) with your thumb hovering above the screen ready to navigate. In this position, it is extremely easy to reach the top of the display and even well beyond it. Your fingers all hold the phone and your thumb navigates the screen.
It really irks me whenever I see iPhone users using their pinky as in the first method - it's no wonder they can't reach the top of the screen..!!!