RMPhoneFormat provides a simple to use class for formatting phone numbers in iOS apps. The formatting should replicate what you would see in the Contacts app for the same phone number.
Running this function on country codes from [NSLocale ISOCountryCodes]
I suspect the Default.phoneformat file could be missing something? I am getting the file from /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/System/Library/PrivateFrameworks/AppSupport.framework/