Disabling radio interface on MBIM device

[Enrico Mioso]

Hello!!
I wanted to disable the radio interface on a device reported as:
Bus 002 Device 003: ID 413c:81b6 Dell Computer Corp. DW5811e Snapdragon™ X7 LTE
I would have liked something equivalent to
AT+CFUN=0

but no serial port.

So I used something like
mbimcli -d /dev/cdc-wdm0 --set-radio-state=off
and now
mbimcli -d /dev/cdc-wdm0 --query-radio-state
says:
[/dev/cdc-wdm0] Radio state retrieved:
 	Hardware radio state: 'on'
 	Software radio state: 'off'

Was I able to do what I wanted?
What is software vs hardware radio?
I guess hw radio refers to locks e.g.: rfkill or something.
Software radio means - radio turned off on software request.

Am I wrong?
Thanks!!

Enrico