The 4g is in the hotspot that you're connecting to via wifi from the mini-computer. That way you don't have baseband firmware exploits to deal with on the linu

The 4g is in the hotspot that you're connecting to via wifi from the mini-computer. That way you don't have baseband firmware exploits to deal with on the linux machine like you would now with a traditional android phone. 4G firmware are all binary blobs that probably have backdoors.