If someone from your address book is calling you and your device doesn’t display his name, the likely problem is that phone number in address book doesn’t contain country calling code.
Country Code Fixer ensures that all your phone numbers have the country calling code with just one touch. This is the only app that:
A phone number without a country calling code cannot be called in roaming, its contact name might not be visible on your car’s handsfree, and it might cause problems with Google Voice. This app fixes all of that in just a couple of seconds. Get it for free from the Windows Phone Store: