A system for multiplexing multiple SIM cards into a single portable computing communication device comprising a data processor, a long range wireless communication system, memory, and at least one SIM card slot, the system comprising: a) a control interface adapted to communicate with a plurality of SIM cards, and select a SIM card from among the plurality of SIM cards based on one or more user defined criteria; b) a host interface adapted to interface with the SIM card slot of the portable computing communication device and communicate with the control interface; c) a plurality of SIM sockets adapted to accept the plurality of SIM cards, at least one of the plurality of SIM sockets being in electronic communication with the control interface; d) a SIM switch communicatively coupled to the control interface, the SIM switch adapted to activate a selected SIM socket from among the plurality of SIM sockets to establish a connection to a service provider network associated with the SIM card in the selected SIM socket, wherein the SIM switch is adapted to present a specific set of electrical signals to the portable computing communication device while establishing the connection to the service provider network associated with the SIM card in the selected SIM socket, the specific set of electrical signals encourage the portable computing communication device to re-initiate connection with the SIM card in the selected SIM socket or to re-register to the service provider network associated with the SIM card in the selected SIM socket; and e) software for managing the operation of the control interface and providing the portable computing communication device with information and controls relating to the plurality of SIM cards. a) a control interface adapted to communicate with a plurality of SIM cards, and select a SIM card from among the plurality of SIM cards based on one or more user defined criteria; b) a host interface adapted to interface with the SIM card slot of the portable computing communication device and communicate with the control interface; c) a plurality of SIM sockets adapted to accept the plurality of SIM cards, at least one of the plurality of SIM sockets being in electronic communication with the control interface; d) a SIM switch communicatively coupled to the control interface, the SIM switch adapted to activate a selected SIM socket from among the plurality of SIM sockets to establish a connection to a service provider network associated with the SIM card in the selected SIM socket, wherein the SIM switch is adapted to present a specific set of electrical signals to the portable computing communication device while establishing the connection to the service provider network associated with the SIM card in the selected SIM socket, the specific set of electrical signals encourage the portable computing communication device to re-initiate connection with the SIM card in the selected SIM socket or to re-register to the service provider network associated with the SIM card in the selected SIM socket; and e) software for managing the operation of the control interface and providing the portable computing communication device with information and controls relating to the plurality of SIM cards. <EOS>