Mobile telephone system capable of coping with a variety of mobile radio telephone systems by a single mobile radio telephone

摘要

A mobile telephone system is capable of coping with a number of different mobile radio telephone systems by a single mobile radio telephone. When a mobile radio telephone exists inside a communication area of a first mobile radio telephone system, in case when a first mobile radio telephone system flag of a first base station and an existing second mobile radio telephone system flag of a second base station coincide with each other, the mobile radio telephone is to execute a mobile radio telephone communication using an existing mobile radio telephone communication protocol software. When the first and the second mobile radio telephone system flags do not coincide with each other, as downloading of a first mobile radio telephone communication protocol software used in the first base station is completed, a mobile radio telephone communication starts. The mobile radio telephone also executes a mobile radio telephone communication after downloading a second mobile radio telephone communication protocol software. IMAGE