Austria has a plethora of mobile phone operators, of which the main ones are listed here. All of them offer prepaid SIM cards that visitors can use to avoid roaming charges (local calls are cheap, receiving calls is free) and to get a local +43 number. SIM cards cost about €5 and can be bought at phone and electronics shops; ID is not necessary. Top-up vouchers are widely available. BOB and Tele.Ring have the best prepaid rates.