Guys, this matter would be best covered under a dedicated thread in the WWAN section of our forum rather than lost in limbo in a "Latitude 7480 - Mojave install: need help" thread.
For your info, now that we know we're dealing with a DW5811 WWAN module (or DW5811e to be precise), you could find it useful to post a picture of it and state what chip it is based on. All that in the relevant aforementioned dedicated thread of course...