A tool that allows you to easily correct invalid phone numbers.
Country phone numbers supported: America, Australia, Britain, Canada, Denmark, France, Germany, Ireland, The Netherlands, Norway, Poland, Spain, Switzerland.
To start using, install and go to Contacts > Contact Validation.
This doesn't perform any validation upon entry, and won't automatically change your data.
This was rebuilt from the earlier UK Phone Number Validator, and has been completely overhauled to use the API, Unit Tests, and a better underlying structure.
Thanks to georges and totten for additional testing.