Just in case


    Here are the parts of the metal face of the sim card:




    VCC: Power supply input
    RST: Used itself or in combination with an internal reset control circuit.
    CLK: Clocking or timing signal
    GND : Ground
    VPP : Programming voltage input
    I/O : Input or Output for serial data to the integrated circuit inside the card.


    ***Some Sim Card have  C2 (Reset) and C6 (VPP) active, While C4 and C6 are used as USB Inter-chip


    RESET: Either used itself (reset signal supplied from the interface device) or in combination with an interal reset control circuit (optional use by the card). If internal reset is implemented, the voltage supply on Vcc is mandatory


    VPP:Programing voltage input (optional). This contact may be used to supply the voltage required to program or to erase the internal non-volatile memory.


    USB Inter-chip: May be used to store extra information.