Running an iPhone 4 sized app on iPhone 5

[Colin Holgate]

It may be that you're not missing anything, but that you have included a Default-568h at 2x.png splash image. That's what dictates whether the app fills the height of the screen. Just don't include that file, and it should work as you expected.

Can you not recode your stack to cope with the extra height, so that iPhone 5 users don't see the letter boxing?