A storage device controls transmission of test data and reception of the test data according to a protocol set for test mode upon receiving, for example, a test instruction, when a reception interface and a transmission interface are electrically connected together through a cable. The roaming minutes are subtracted from the user’s account when calls are made outside the home calling area defined by the user’s calling plan. A top region of the blank is connected to a detachable top part of the outer wrapper, namely a film cap, and is also removed when the pack is opened for the first time. The host computer collates the previous-received ID and the ID received together with the response information with each other so that the command and the corresponding response can be made correspond to each other.