A phone number without a country calling code can't be called in roaming, its contact name might not be visible on your car’s handsfree, and it might cause problems with services like Google Voice.
This app fixes all of that in a seconds by fixing all improper numbers. Country Code Fixer ensures that all your phone numbers have the country calling code with just one touch. You have the complete control of the process and you can exclude some changes in the preview.
This is the only app that contains a database of international calling rules for 224 locales, so there is no need to setup anything.