The ISO 3166-1 alpha-2 country the user selected for phoneNumber (for example 'US').
Supply it when your screen renders a country dropdown next to the phone number field, using a
code from countryCodes.available. The submitted country is then authoritative:
the server prefixes its dial code rather than inferring a country from the digits or from
geo-IP, so phoneNumber should be the national number without a dial code.
Omit it to keep the existing behaviour, where the server derives the country itself and
pickCountryCode() changes the selection on a separate screen.
The ISO 3166-1 alpha-2 country the user selected for
phoneNumber(for example'US').Supply it when your screen renders a country dropdown next to the phone number field, using a
codefromcountryCodes.available. The submitted country is then authoritative: the server prefixes its dial code rather than inferring a country from the digits or from geo-IP, sophoneNumbershould be the national number without a dial code.Omit it to keep the existing behaviour, where the server derives the country itself and
pickCountryCode()changes the selection on a separate screen.