Patent ID: 7376423

Claim:
A mobile communication device, comprising: registering means for registering area information about a base station based on an operation by a user of said mobile communication device; storing means for storing information about a contact; judging means for judging whether or not said mobile communication device is in a registered area in said registering means; notifying means for notifying said contact about a deviation from said registered area when it is judged that said mobile communication device is not in said registered area and for sending current location information of said mobile communication device to said contact at the same time as notifying said contact about the deviation; and a calculating means for calculating a time interval during which a handover occurs between base stations, wherein said notifying means notifies said contact about a deviation from said registered area when said time interval is over a predetermined time, and said notifying means does not notify said contact about a deviation from said registered area when said time interval is below a predetermined time.