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Smart dust technology...
SECRET MSGS phone companies DON'T want you to know about
That is what SIM expert David Allen Burgess asked when he found secret records of phone activity that the user had no idea about.
Welcome to the magical world of proactive SIMs - SIM cards that send data off your phone without you or your phone's operating system knowing.
There is no public documentation about these messages, there's no way to see all the information in the messages, and the cell companies won't talk about it.
Are SIM cards more vulnerable than we'd thought?