From Longman Dictionary of Contemporary Englishphone in phrasal verb1TELEPHONEto telephone the place where you work, especially in order to report something 🔊 I’ll phone in and let them know.phone something ↔ in 🔊 I’ll phone the report in tomorrow morning. 🔊 She phoned in sick (=telephoned to say that she was ill and could not come to work).2TELEPHONEto telephone a radio or television show to give your opinion or ask a question 🔊 There’s still time to phone in before the end of the programme. →phone-in →phone→ See Verb table
Examples from the Corpus
phoned in sick• Thursday morning, Stafford, who had not missed a day because of illness in six years, phoned in sick.