$ sudo killall -TERM ModemManager
ModemManager: no process found
$ rfkill list
0: tpacpi_bluetooth_sw: Bluetooth
        Soft blocked: yes
        Hard blocked: no
1: tpacpi_wwan_sw: Wireless WAN
        Soft blocked: no
        Hard blocked: no
2: phy0: Wireless LAN
        Soft blocked: no
        Hard blocked: no
$ sudo qmicli -p -d /dev/cdc-wdm0 --dms-get-power-state
[/dev/cdc-wdm0] Device power state retrieved:
        Power state: 'external-source'
        Battery level: '0 %'
$ sudo qmicli -p -d /dev/cdc-wdm0 --dms-get-operating-mode
[/dev/cdc-wdm0] Operating mode retrieved:
        Mode: 'low-power'
        HW restricted: 'yes'
$ sudo qmicli -p -d /dev/cdc-wdm0 --nas-get-signal-strength
[/dev/cdc-wdm0] Successfully got signal strength
Current:
        Network 'none': '-128 dBm'
RSSI:
        Network 'none': '-128 dBm'
ECIO:
        Network 'none': '-2,5 dBm'
IO: '-106 dBm'
SINR: (8) '9,0 dB'
$ sudo qmicli -p -d /dev/cdc-wdm0 --nas-get-serving-system
error: couldn't get serving system: QMI protocol error (74): 'InformationUnavailable'