Abstract: An electronic device and an method of operating an electronic device according to various example embodiments include: acquiring one of a plurality of pieces of identification information which are already registered; setting one of a plurality of function sets which are already registered based on the acquired identification information; and allowing access based on the set function set.

Abstract: An electronic device and an method of operating an electronic device according to various example embodiments include: acquiring one of a plurality of pieces of identification information which are already registered; setting one of a plurality of function sets which are already registered based on the acquired identification information; and allowing access based on the set function set.

Abstract: An apparatus and a method for searching for a phone number in a mobile terminal are provided. The apparatus includes a phonebook search unit. The phonebook search unit provides a phone number of a user who has a registered location corresponding to a location to which the mobile terminal moves. Accordingly, a phone number search procedure is reduced by allowing a position information service to cooperate with a phone number search service, determining a phone number of a user who has a registered location corresponding to an area where a mobile terminal is located, and performing communication connection without a separate phone number search process in a mobile terminal.

Abstract: An output buffer control circuit is provided in which a three-phase (state) level of an output warning can be realized in a short time, which results in increasing the processing speed. The output buffer control circuit uses a predetermined width pulse at the point when the output control signal is changed to low level. The predetermined width pulse is operated with the previous output signal and the resultant signal feeds back to the output terminal.