This module provides a stricter telephone number field that normalizes numbers to the E.164 format, which is useful for validation and consistent formatting, unlike the basic text field provided by the deprecated telephone module.
Telephone has been deprecated and moved to https://www.drupal.org/project/telephone we should include this there.
This module spun off from a core issue #3482705: Allow storing telephone number in E164 format
One of the biggest challenges with the current Telephone module is that it's just a glorified textfield. It has no option to normalize the telephone number - either for the purpose of validation or formatting.