We call this item a 'Mobile Phone', what do Americans call it?
Call sign trail name). Some wireless networking protocols also allow an SSID or a MAC address to be set as an identifier, but with no guarantee that this label will remain unique. International regulations no longer require a call sign for broadcast stations; however, they are still required for broadcasters in many countries, including the United States. Mobile phone services do not use call signs on-air because the phones and their users are not licensed, instead the cell operator is the one holding the license. However, the U.S. still assigns a call sign to each mobile-phone spectrum license. In the United States,
Call-through telecom number, which is then routed over VoIP to the point when it is terminated at the recipient's physical phone line (fixed landline or wireless mobile or cell line), even in another country. This is what call-through telecom operators do - they provide call termination at both ends of the call. There are several cheap call-through numbers in Austria, for example toolani. Quite a lot of call-through companies are active in the German market, typically offering their services via 0180 Shared Cost Service numbers charged at 0.039 € to 0.14 € per minute from German landlines, and up to 0.42 €