Hi
I would like to suggest that a feature be added to the customer/address registration form. The feature would basically be that when a customer is registering or adding an address that a country code option be available before typing in the phone number.
It would make everything cleaner since customers either type their phone number with or without the country code.
For example
--or--
I would also like to suggest that the input field for phone numbers be restricted to numeric values since a lot of autofill options sometimes put something entirely different in those fields (names, comments etc.).