Quectel EM120 FCC locked
The Quectel EM120 provided in the newer Thinkpad X1 Carbon Gen9 laptops comes FCC locked by default. There is currently no open source solution to unlock the module, although there seems to be some existing tool to do so already, as per the following Ubuntu bug report: https://bugs.launchpad.net/ubuntu/+source/modemmanager/+bug/1934286
Quoting from the bug description:
4.4 Check the modem’s status
$ mmcli --modem 0
4.5 Install and execute Lenovo’s FCC unlock app ( for Quectel modem only )
$ sudo snap install --devmode --dangerous dpr-wwan_1.0-wwan-test_amd64.snap
4.6 Enable the detected modem
$ sudo mmcli --modem 0 --enable
The dpr-wwan_1.0-wwan-test_amd64.snap package should provide the unlock tool, would be good to see if it can be integrated easily in ModemManager/libqmi/libmbim.