Mobile communication device, mobile communication device control program, and mobile communication device control method

There is provided a mobile communication device having a function capable of releasing lock on an IC card function by an authentication key other then a PIN if the IC card function is locked by a PIN authentication error in a mobile phone having a contactless IC card built in. When a PIN is locked in a mobile phone having a contactless IC card built in, an IC application is started up to transmit a second password other than a PIN to an authentication server . The authentication server compares the second password received from the mobile phone with another second password stored in a database . If both second passwords agree with each other, a PIN lock release command is transmitted to the mobile phone . Further, the mobile phone switches the lock flag of the contactless IC card to OFF from ON by the command received. The PIN lock of the IC card function is thereby released.