public static function asPhoneInt($phone, $defaultRegionAlpha2)
    {
        $phoneUtil = PhoneNumberUtil::getInstance();

        try {
            $phoneNumber = $phoneUtil->parseAndKeepRawInput($phone, $defaultRegionAlpha2);
            return $phoneUtil->format($phoneNumber, PhoneNumberFormat::INTERNATIONAL);
        } catch (NumberParseException $e) {
            return $phone;
        }
    }