It stores the service-subscriber key that is used to identify a subscriber for mobile communication devices. the sim card grants the user access to the wireless network of whichever service provider is used based on the chosen service plan.
AvantGuard Monitoring Centers, LLC. | P.O. Box 15022 | Ogden, UT 84415 | Office: (877) 206-9141 | Fax: (801) 781-6133