My new Thinkpad has a Quectel EM05-G modem. For some reason it refused connect, even though it showed up in Gnome settings on Ubuntu 22.10. I checked with “mmcli -m 0 and it said “sim missing” as its state.
After some Googling it appeared the modem ships in some kind of a locked state, so it only works in Windows. I checked with “mbimcli”:
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$ sudo apt install libmbim-utils $ sudo mbimcli -p -d /dev/cdc-wdm0 --quectel-query-radio-state [/dev/cdc-wdm0] Radio state retrieved: 'fcc-locked' |
It was easy to unlock:
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$ sudo mbimcli -p -d /dev/cdc-wdm0 --quectel-set-radio-state=on [/dev/cdc-wdm0] Successfully requested to enable radio $ sudo mbimcli -p -d /dev/cdc-wdm0 --quectel-query-radio-state [/dev/cdc-wdm0] Radio state retrieved: 'on' |
After this, Gnome was able to enable the mobile broadband connection without problem.