function get($countryCode = false, $separator = '')
    {
        if ($countryCode == false) {
            $formattedNumber = '0' . $this->msisdn;

            if ( ! empty($separator)) {
                $formattedNumber = substr_replace($formattedNumber, $separator, 4, 0);
                $formattedNumber = substr_replace($formattedNumber, $separator, 8, 0);
            }

            return $formattedNumber;
        } else {
            $formattedNumber = $this->countryPrefix . $this->msisdn;

            if ( ! empty($separator)) {
                $formattedNumber = substr_replace($formattedNumber, $separator, strlen($this->countryPrefix), 0);
                $formattedNumber = substr_replace($formattedNumber, $separator, 7, 0);
                $formattedNumber = substr_replace($formattedNumber, $separator, 11, 0);
            }

            return $formattedNumber;
        }
    }