The second operating system hiding in every mobile phone
"Every smartphone or other device with mobile communications capability (e.g. 3G or LTE) actually runs not one, but two operating systems. Aside from the operating system that we as end-users see (Android, iOS, PalmOS), it also runs a small operating system that manages everything related to radio."
Fri Dec 16 13:03:48 2016 - permalink -
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http://www.osnews.com/story/27416/The_second_operating_system_hiding_in_every_mobile_phone