Patent ID: 7715189

Claim:
A laptop-type personal computer operable on power supplied from one or both of an AC adaptor and a battery pack, comprising: a SIM card loader configured to detachably load a SIM card to a wide area wireless communication network, in which the SIM card has subscriber information associated with a subscriber stored therein; a communicator configured to be connectible to the wide area wireless communication network with the SIM card loaded in the SIM card loader, said communicator being electrically connected to the SIM card when the SIM card is loaded in the SIM card loader; a cover mechanism configured to cover and uncover the SIM card loader; a detector configured to detect whether the SIM card loader is covered by the cover mechanism; a power supply circuit configured to obtain power from the one or both of the AC adaptor and the battery pack, and to supply power to said communicator and to the SIM card by way of said communicator; and a controller configured to control whether or not power is supplied to the SIM card loaded on the SIM card loader such that (i) power is supplied to the SIM card loaded on the SIM card loader when the cover mechanism covers the SIM card loader and when the AC adaptor or the battery pack supplies power to the personal computer and (ii) power is not supplied to the SIM card loaded on the SIM card loader when the cover mechanism uncovers the SIM card loader even while the AC adaptor supplies power to the personal computer, wherein the controller is configured to stop the power from being supplied to the SIM card by stopping the power supplied to said communicator.