One of the mysteries of the English language finally explained.
A telephone used for radio-telephony; a telephone for communicating using radio waves rather than wires; = "radio-telephone"; (in later use) = "mobile phone".
Late 19th century; earliest use found in The Westminster Gazette. From wireless + telephone.
wireless telephone/ˌwʌɪələs ˈtɛlɪfəʊn/
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