Patent ID: 8175659

Claim:
A mobile terminal device configured to connect to a network, comprising: a wireless communication interface configured to connect to the network through wireless communication; an external power source supply unit configured to be supplied power from an outside of the mobile terminal device for one of charge and replacement of a built-in battery; a power supply state detection unit configured to detect that a state, in which power is supplied from the outside to the external power source supply unit, is attained; a power on/off switch which is operated by an operator and configured to turn on/off power of the mobile terminal device; a wireless connection on/off switch which is operated by an operator and configured to turn on/off a wireless function performed by the wireless communication interface; and a control unit configured to set a state in which the wireless function performed by the wireless communication interface is available regardless of both the power on/off switch and the wireless connection on/off switch being turned off from a previous on state in a case where the power supply state detection unit detects the state in which the power is supplied from the outside to the external power source supply unit is attained.