Patent ID: 8543090
Filing Date: 2013-09-24
Classification: H04M

Abstract:
1. A mobile terminal shifting a state between a restricted state for restricting a key operation and an unrestricted state for making a key operation unrestricted, comprising: a first selector for selecting said unrestricted state when a PIN code is input by a code inputting operation in a first restricted state for restricting a key operation so as to not perform a function associated with the key operation, excluding at least the code inputting operation; a second selector for determining whether a number of unsuccessful code inputting operations in said first restricted state is above a threshold value, selecting said first restricted state when it is determined that the number of unsuccessful code inputting operations is not above the threshold value, and selecting a second restricted state for restricting a key operation including at least the code inputting operation when it is determined that the number of unsuccessful code inputting operations is above the threshold value; a communicator for executing a short range radio communication with an external communication device; and a threshold changer for determining a possibility of a key operator being a qualified person and increasing said threshold value when said possibility is determined to be high, wherein said threshold changer determines that said possibility is high when said terminal itself is inside a predetermined area, and determines that said possibility is low when said terminal itself is outside said predetermined area.