phone in phrasal verb ( see also ↑ phone )
1 . to 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) .
2 . to 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