A personal communication system handset having a plurality of slots provided therein. Each one of the slots is adapted to store a corresponding one of a plurality of removable/insertable subscriber identity modules. The subscriber identity modules have stored therein different subscriber information. A user is thereby able to subscribe to two, or more, different providers and is able to remove at least one of the modules for use in another handset. An electronic switch is disposed in the handset for electrically coupling one of the modules to a transceiver in the handset selectively in accordance with a program stored in the handset based on a signal received by the transceiver from a base station cell. The selected module provides the base station cell with the stored subscriber information. Thus, the handset can automatically select the proper module based on the stored program. An automatic subscriber identification module control system is also provided. The system includes a handset having a plurality of subscriber identity modules. A transceiver is disposed in the handset for receiving and transmitting signals from and to a plurality of base station cells. A memory is also disposed in the handset, such memory storing an executable program. A processor in the handset is responsive to the signals received by the transceiver, or solely from information stored in the memory, and is adapted to execute the stored program to producing a control signal in accordance with the received signals and/or the executed program.