Patent ID: 7020487

Claim:
A compound information terminal device at least comprising: a first communication device which performs wireless communication using a first frequency band; a second communication device which performs wireless communication using a second frequency band; and a third communication device which receives a signal of a third frequency band, means for performing a control operation so that when intermodulation distortion of a signal of the first frequency band handled by said first communication device with a signal of the second frequency band handled by said second communication device has a frequency component that enters in said third frequency band, up to two of said first to third communication devices are communication enabled at all times in accordance with a predetermined setting, or an alternate switching control is conducted such that while one of said first to third communication devices is communication enabled at all times, one of the remaining two devices is communication enabled for a preset time period during which the other is communication disabled, and subsequently said one communication device is communication disabled for a preset time period during which the other communication device is communication enabled.