| 摘要 |
PROBLEM TO BE SOLVED: To provide an automatic time revising method that enables a mobile telephone to automatically revise the time depending on the country when the mobile telephone makes an international communication. SOLUTION: The automatic time revising method is for automatically revising time into a time of a country, a memory 11 of the mobile telephone includes a database for storing the time of each country in the world. Since the database has a comparison table between the time differences of each country in the world and telephone systems, when a central processing unit 13 of the mobile telephone discriminates that the telephone system of a connection destination differs from the telephone system of the connection source, the central processing unit 13 reads the time difference and the country from the database on the basis of a preset time depending on the connection destination telephone system, updates the original time setting into the time of the country depending on the confirmed time difference and displays the result on the monitor 15 of the mobile telephone. |
