Not sure if anyone knows, but the KST Engineer developed a sim card tool to work with his KST (Kone Service Tool). Quite a complicated interface, you won't just throw one together. You plug in the sim card and run the program attached to the interface and it simulates a sim card. after it is run you can disconnect the interface and the controller thinks a sim card is plugged in until power is cycled. It works!!! Have to have his special programs also to run. Dongle protected!