On another forum there is a discussion of SIM cards. I seem to recall reading that among the values stored on a SIM is a counter that increments every time the SIM is power cycled. After some very large number of off-on power cycles the counter runs out and the card stops working. I am not able to locate a reference for this information and was wondering if anyone here could point me to a reference or describe this function, if it actually exists or if I'm just making it up. Thanks.