Cell search method for use in a mobile radio terminal adaptable to at least two kinds of mobile telephone systems

移动无线终端10适用于两种移动电话系统A和B，将系统A和B的优先级设置为A＞B。当移动无线终端(10)位于位置M1时，在移动无线终端(10)和系统B之间执行位置登记，并且移动无线终端(10)处于系统B中的待机状态下。当移动无线终端(10)移动到另一位置M2，并且通过对系统A的小区搜索(周期性的)检测到系统A的小区时，执行移动无线终端(10)和系统(A)之间的位置登记，并且将移动无线终端(10)切换到系统A中的待机状态下。如果用户执行"与传输有关的操作"，则立即执行小区搜索，以使移动无线终端(10)处于系统A中的待机状态下。 A mobile radio terminal 10 is adaptable to two kinds of mobile telephone systems A and B given priorities as A > B. When the mobile radio terminal (10) is located at a position M1, location registration is carried out between the mobile radio terminal (10) and the system B and the mobile radio terminal (10) is in a standby state in the system B. When the mobile radio terminal (10) moves to another position M2 and detects a cell of the system A by cell search (periodic) for the system A, location registration is carried out between the mobile radio terminal (10) and the system A and the mobile radio terminal (10) is turned into a standby state in the system A. If a user executes a "transmission-related operation", cell search is immediately carried out to put the mobile radio terminal (10) into the standby state in the system A.