Fun part about LTE modems is that they usually pack not one, but two OS in them: Android as well as VxWorks that actually handle work with cellular. So your co

Fun part about LTE modems is that they usually pack not one, but two OS in them: Android as well as VxWorks that actually handle work with cellular. So your connection usually going like that: Carrier -> HW -> VxWorks -> Android-based OS -> your device.