Wireless Joint

That does not work on this model I already tried it a long time ago.

Any device can update if on a carrier that supports the particular device and the device passes the carriers integrity check, and they can full update both sides of the device (OS2 and linux)
it depends on what the carrier is sending to that model at that time, having said that full updates are not ...

This looks authoritative:

https://github.com/0xBAADF0OD/netgear_m ... T-commands