On my Ubuntu 20.04.1 tablet I try to get WWAN working.
But after insert of the SIM card, there is no prompt for the SIM PIN. Therefore, the ttyHS2 device is "not available", I assume (if this may be a different problem, please advise! :) ).
I know that network manager always was dense in asking for the SIM PIN. Therefore, I tried to do this via CLI. But the new network manager cli utility has a complete new syntax, which is why 99% of search machine founds does not help!
$ nmcli --version nmcli-Werkzeug, Version 1.22.10
The complete man page of nmcli does not contain the phrase "pin" (as own word). Does anyone know how this is possible??
Of course: I made thousands of restarts, reinserted the SIM card many times, enabled/disabled the whole network stuff multiple times via UI.