1884, colloquial shortening of telephone (n.), "generally applied to the receiver, but sometimes to the whole apparatus" [Century Dictionary, 1895]. Phone book "publication listing telephone numbers and their associated names" is by 1920; phone booth "small enclosure or stall provided with a public pay-telephone" is by 1906; phone bill "statement of charges for telephone service" is by 1901; phone number (short for telephone number) is by 1906.
"to call on the telephone," 1884, colloquial, from phone (n.). Related: Phoned; phoning.
"elementary sound of a spoken language, one of the primary elements of utterance," 1866, from Greek phōnē "sound, voice," from PIE root *bha- (2) "to speak, tell, say."