Patent ID: 8892073

Claim:
A mobile device connectable to an earphone to be mounted in an ear, comprising: a mount judging unit for judging whether or not said earphone is mounted in an ear; an operating unit for accepting an operation from outside of the mobile device; a valid/invalid setter for making a setting to confirm whether the operation accepted by said operating unit is valid or invalid; and a controller for controlling the mobile device depending on operations accepted by said operating unit while said valid/invalid setter is making a setting for validating operations; wherein after mount judging unit transitions from a state wherein it decides that said earphone is not mounted in the ear to a state wherein it decides that said earphone is mounted in the ear, if said operating unit accepts a preset unlocking operation, then said valid/invalid setter makes a setting for validating operations which will subsequently be accepted by said operating unit, and will keep the setting until said mount judging unit decides that said earphone is not mounted in the ear.