1. An apparatus for processing call services in a mobile terminal, the apparatus comprising: a communication unit configured to: send voice signals during a call, and receive voice signals during a call; a sensing unit configured to sense a state change of the mobile terminal; a control unit configured to: recognize, during a call, voice signals, produce speech analysis information on the basis of speech recognition results, predict, when a state change of the mobile terminal is detected by the sensing unit, an application corresponding to the speech analysis information, and activate the application as a follow-up service; and a display unit configured to output the follow-up service.