The landlines are only available if you also hire an internet line, either fiber or Wi-Fi. It is a requirement because they are connected to the router.
Countries included in the international fixed rate FIXED: Germany, Argentina, Austria, Belgium, Brazil, Canada, China, Croatia, Denmark, USA, Peru, Portugal, United Kingdom, Czech Rep., Romania, Russia, France, Greece, Holland, Hong Kong, Hungary, India, Singapore, Sweden, Switzerland, Thailand, Ireland, Israel, Italy, Norway, Turkey, Venezuela.