Computer-readable storage medium containing program instructions for managing data in communication terminal

摘要

A telephone directory database is established in a mobile phone terminal. When a calling operation is executed in the mobile phone terminal, data included in the telephone directory database is sent out into the data network. A server computer in the central office may receive the data. The received data is registered into a database for backup data in the server computer. The backup data for the telephone directory database is reliably prepared in the server computer in this manner. A user of the mobile phone terminal is allowed to easily reestablish the telephone directory database in a new mobile phone terminal based on the backup data.