'Update this phone number instance'

def update(self, sid, **kwargs):

    kwargs_copy = dict(kwargs)
    change_dict_key(kwargs_copy, from_key='status_callback_url', to_key='status_callback')
    if ('application_sid' in kwargs_copy):
        for sid_type in ['voice_application_sid', 'sms_application_sid']:
            if (sid_type not in kwargs_copy):
                kwargs_copy[sid_type] = kwargs_copy['application_sid']
        del kwargs_copy['application_sid']
    return self.update_instance(sid, kwargs_copy)
