I made a DefaultDeviceProfiles.ini file to scale my game depending on which iPhone it is running on. For the iPhone 5, 5S, 5c, 6, and 6+, everything is scaled correctly (either r.MobileContentScaleFactor=2 or 0).
Running my game on an iPhone 4 or 4s, though, causes some of the game to be cut off vertically. The iPhone 4’s vertical resolution is a fair bit less than the others, so part of my game on the top and bottom of the screen is missing. This only occurs in the level itself – the UMG widget I have on-screen is correctly positioned. I tried using r.MobileContentScaleFactor=0 or 1, but neither of those lead to my game being properly scaled on the phone.