PURPOSE: To improve operability by informing a user of a usable corresponding system at the time of moving inside the usable area of the certain corresponding system.

CONSTITUTION: When this mobile communications equipment is inside the service area of a corresponding cellular telephone system, a control channel sent out from the base station of the cellular telephone system is complemented, the control information of the system is received through an antenna 1 by a reception circuit 6, demodulated by a demodulation circuit 7 and analyzed by a microprocessor 10 and it is displayed by a display device 13 that the mobile communications equipment is inside the service area of the cellular telephone system. Further, when the mobile communications equipment moves into the service area of a corresponding cordless telephone system, the control channel sent out from the master station of the cordless telephone system is complemented, the control information of the system is received through the antenna 1 by the reception circuit 2, demodulated by the demodulation circuit 3 and analyzed by the microprocessor 10 and it is displayed by the display device 13 that the mobile communications equipment is inside the service area of the cordless telephone system.