How can I change the iOS App Store Country on my iPhone 5?
On your iPhone 5 follow these steps:


Tap on the App Store icon in your Home Screen.
Tap on Featured on the bottom left corner of screen.
Scroll all the way to the bottom where your Apple ID info is.  Tap on it.
Tap View Apple ID, you may have to enter your password.
Once the page loads Change your country/Region to United States.


Must not have any credits in your account
Must have a valid payment method for the desired country - there is no longer a none option.