Class PhoneField

// Logs the label for all the address fields associated with contact
// 'John Doe'. This method can be similarly called for any field that has
// a label.
var contacts = ContactsApp.getContactsByName('John Doe');
var addressFields = contacts[0].getAddresses();
for (var i = 0; i < addressFields.length; i  ) {
  Logger.log(addressFields[i].getLabel());
}

// Logs whether or not the first address field associated with contact
// 'John Doe' is labeled as primary. This method can be similarly called
// for any field.
var contacts = ContactsApp.getContactsByName('John Doe');
var addressFields = contacts[0].getAddresses();
Logger.log(addressFields[0].isPrimary());

// Sets the the first address field associated with contact 'John Doe'
// as primary. This method can be similarly called for any field.
var contacts = ContactsApp.getContactsByName('John Doe');
var addressFields = contacts[0].getAddresses();
addressFields[0].setAsPrimary();

// Sets the label to 'Work' for the first address field associated
// with contact 'John Doe'. This method can be similarly called for any
// field that has a label.
var contacts = ContactsApp.getContactsByName('John Doe');
var addressFields = contacts[0].getAddresses();
addressFields[0].setLabel(ContactsApp.Field.WORK_ADDRESS);

// Sets the label to 'Apartment' for the first address field associated
// with contact 'John Doe'. This method can be similarly called for any
// field that has a label.
var contacts = ContactsApp.getContactsByName('John Doe');
var addressFields = contacts[0].getAddresses();
addressFields[0].setLabel('Apartment');