Abstract: A portable electronic apparatus is enabled to notify its position depending on whether user authentication by its authenticating function is unsuccessful or not, when an instruction for controlling the power of the apparatus is given. A controlling unit determines by a condition determining function whether or not the user authentication by the authenticating function when the user gives a long pressing operation on a power key is unsuccessful or not. In a case where the authentication result coincides with a predetermined function, the controlling unit continues power supply to each element that constitutes a position notifying function. Even after the power is switched off, the position notifying function, which is kept operating, sends position information.

Abstract: A portable electronic apparatus is enabled to notify its position depending on whether user authentication by its authenticating function is unsuccessful or not, when an instruction for controlling the power of the apparatus is given. A controlling unit determines by a condition determining function whether or not the user authentication by the authenticating function when the user gives a long pressing operation on a power key is unsuccessful or not. In a case where the authentication result coincides with a predetermined function, the controlling unit continues power supply to each element that constitutes a position notifying function. Even after the power is switched off, the position notifying function, which is kept operating, sends position information.