When trying to create a new customer, I've found a bit of a visual ambiguity for the required field indicator on iPhone screens.
The first picture is of the New Customer section of the Login screen, showing the *s for required fields at the end of the fields, which is clear enough.

The second picture shows the same screen on an iPhone 5.

Unfortunately the *s end up on a line by themselves and it's not totally clear which field they apply to. Would it be clearer (and possible) to put them after the text label?
i.e.
First Name: *
[ Text Field ]
Last Name: *
[Text Field ]
etc.
Andy