so I bought one of those 4G Wifi modems you can find all over Aliexpress.
It initially reports as 05c6:f000 and then mode_switches to 05c6:6000 which is usb_serial.
I can setup a 3g connection via ppp and max out at around 10mbit.
BUT this thing is a true LTE modem, when using it in WIFI mode (plugging it into a usb power socket) it's connecting via 4G and does ~ 150Mbit. I didn't test the dongle mode under Windows, cause I don't want Chinese Spyware.
Anyone also experimenting with those (cheap) devices? Any clue how to switch this thing into LTE mode?