In broadcasting, a phone-in or call-in is a programme format in which viewers or listeners are invited to air their live comments by telephone, usually in respect of a specific topic selected for discussion on the day of the broadcast. On radio (especially talk radio), it is common for an entire programme to be dedicated to a phone-in session. On television, phone ins are often part of a wider discussion programme: a current example in the UK is The Wright Stuff.
BBC Radio Nottingham is credited with having aired the first British phone-in on 4 February 1968, in a programme called What Are They Up To Now?
Speech based Talk Radio UK was launched in 1995, with much of its programming featuring phone-ins. It also introduced the notion of the shock jock to the UK, with presenters like Caesar the Geezer and Tommy Boyd constructing heated discussions.
Ian Hutchby has researched power relations in phone ins, looking at arguments and confrontations. Using conversation analysis, he describes how the host retains power through devices such as "The Second Position" — the concept of going second in a discussion, giving the host time to formulate a response.