To provide a technique for informing the user of the incoming to a mobile phone through an external device such as a television, making use of an interface standardly equipped in the external device even when the power of the external device is off. The mobile phone includes a signal producing section for producing an incoming information signal containing information for informing the user of the incoming to the mobile phone in conformity to the HDMI standards when at least one of voice communication and data communication is received; and an HDMI communication section for outputting the incoming information signal to the external device to communicate with the external device capable of performing signal transmission conformed to the HDMI standards through a signal transmission medium conformed to the HDMI standards.