u@u-Latitude-7320:~$ uname -ar
Linux u-Latitude-7320 5.11.0-33-generic #35-Ubuntu SMP Mon Aug 16 23:50:22 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
u@u-Latitude-7320:~$ lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 21.04
Release:	21.04
Codename:	hirsute
u@u-Latitude-7320:~$ mmcli -V
mmcli 1.16.6
Copyright (2011 - 2021) Aleksander Morgado
License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl-2.0.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

u@u-Latitude-7320:~$ sudo systemctl status ModemManager.service 
[sudo] password for u: 
● ModemManager.service - Modem Manager
     Loaded: loaded (/lib/systemd/system/ModemManager.service; enabled; vendor >
     Active: active (running) since Wed 2021-08-25 01:54:37 EDT; 17min ago
   Main PID: 661 (ModemManager)
      Tasks: 5 (limit: 18794)
     Memory: 10.3M
     CGroup: /system.slice/ModemManager.service
             ├─661 /usr/sbin/ModemManager
             └─941 /usr/libexec/mbim-proxy

Aug 25 02:03:30 u-Latitude-7320 ModemManager[661]: <info>  [modem1] state chang>
Aug 25 02:03:30 u-Latitude-7320 ModemManager[661]: <info>  [modem1] simple conn>
Aug 25 02:03:30 u-Latitude-7320 ModemManager[661]: <info>  [modem1] simple conn>
Aug 25 02:03:30 u-Latitude-7320 ModemManager[661]: <info>  [modem1] simple conn>
Aug 25 02:03:30 u-Latitude-7320 ModemManager[661]: <info>  [modem1] state chang>
Aug 25 02:03:30 u-Latitude-7320 ModemManager[661]: <info>  [modem1] 3GPP regist>
Aug 25 02:03:30 u-Latitude-7320 ModemManager[661]: <info>  [modem1] 3GPP regist>
Aug 25 02:03:30 u-Latitude-7320 ModemManager[661]: <info>  [modem1] state chang>
Aug 25 02:03:30 u-Latitude-7320 ModemManager[661]: <info>  [modem1] state chang>
Aug 25 02:03:30 u-Latitude-7320 ModemManager[661]: <info>  [modem1] simple conn>

u@u-Latitude-7320:~$ mmcli --modem 0
error: couldn't find modem
u@u-Latitude-7320:~$ mmcli --list-modems 
    /org/freedesktop/ModemManager1/Modem/1 [Dell Inc.] DW5821e Snapdragon X20 LTE
u@u-Latitude-7320:~$ mmcli --modem 1
  -----------------------------------
  General  |                    path: /org/freedesktop/ModemManager1/Modem/1
           |               device id: 4923dbfe4b64a69189e0263620fcfdb6ffdcba86
  -----------------------------------
  Hardware |            manufacturer: Dell Inc.
           |                   model: DW5821e Snapdragon X20 LTE
           |       firmware revision: T77W968.F1.0.0.4.9.GC.012
           |                          033
           |          carrier config: GCF
           | carrier config revision: 08E0000C
           |            h/w revision: DW5821e Snapdragon X20 LTE
           |               supported: gsm-umts, lte
           |                 current: gsm-umts, lte
           |            equipment id: 355446093024475
  -----------------------------------
  System   |                  device: /sys/devices/pci0000:00/0000:00:14.0/usb4/4-4
           |                 drivers: option, cdc_mbim
           |                  plugin: dell
           |            primary port: cdc-wdm0
           |                   ports: cdc-wdm0 (mbim), ttyUSB0 (at), ttyUSB1 (at), ttyUSB2 (gps), 
           |                          ttyUSB3 (qcdm), wwan0 (net)
  -----------------------------------
  Status   |          unlock retries: sim-pin (3), sim-pin2 (3)
           |                   state: connected
           |             power state: on
           |             access tech: lte
           |          signal quality: 77% (cached)
  -----------------------------------
  Modes    |               supported: allowed: 3g; preferred: none
           |                          allowed: 4g; preferred: none
           |                          allowed: 3g, 4g; preferred: 4g
           |                          allowed: 3g, 4g; preferred: 3g
           |                 current: allowed: 3g, 4g; preferred: 4g
  -----------------------------------
  Bands    |               supported: utran-1, utran-4, utran-6, utran-5, utran-8, utran-9, 
           |                          utran-2, eutran-1, eutran-2, eutran-3, eutran-4, eutran-5, eutran-7, 
           |                          eutran-8, eutran-12, eutran-13, eutran-14, eutran-17, eutran-18, 
           |                          eutran-19, eutran-20, eutran-25, eutran-26, eutran-28, eutran-29, 
           |                          eutran-30, eutran-32, eutran-38, eutran-39, eutran-40, eutran-41, 
           |                          eutran-42, eutran-43, eutran-46, eutran-66, utran-19
           |                 current: utran-1, utran-4, utran-6, utran-5, utran-8, utran-9, 
           |                          utran-2, eutran-1, eutran-2, eutran-3, eutran-4, eutran-5, eutran-7, 
           |                          eutran-8, eutran-12, eutran-13, eutran-14, eutran-17, eutran-18, 
           |                          eutran-19, eutran-20, eutran-25, eutran-26, eutran-28, eutran-29, 
           |                          eutran-30, eutran-32, eutran-38, eutran-39, eutran-40, eutran-41, 
           |                          eutran-42, eutran-43, eutran-46, eutran-66, utran-19
  -----------------------------------
  IP       |               supported: ipv4, ipv6, ipv4v6
  -----------------------------------
  3GPP     |                    imei: 355446093024475
           |           enabled locks: sim, fixed-dialing
           |             operator id: 46692
           |           operator name: Chunghwa Telecom
           |            registration: home
  -----------------------------------
  3GPP EPS |    ue mode of operation: csps-2
           |     initial bearer path: /org/freedesktop/ModemManager1/Bearer/0
           |  initial bearer ip type: ipv4v6
  -----------------------------------
  SIM      |        primary sim path: /org/freedesktop/ModemManager1/SIM/0
  -----------------------------------
  Bearer   |                   paths: /org/freedesktop/ModemManager1/Bearer/1
u@u-Latitude-7320:~$ lib
libnetcfg                    libreoffice                  libwacom-list-local-devices  
u@u-Latitude-7320:~$ dpkg -l |grep libmbim
ii  libmbim-glib4:amd64                        1.24.8-1~21.04                                                       amd64        Support library to use the MBIM protocol
ii  libmbim-proxy                              1.24.8-1~21.04                                                       amd64        Proxy to communicate with MBIM ports
u@u-Latitude-7320:~$ dpkg -l |grep libqmi
ii  libqmi-glib5:amd64                         1.28.6-1~21.04                                                       amd64        Support library to use the Qualcomm MSM Interface (QMI) protocol
ii  libqmi-proxy                               1.28.6-1~21.04                                                       amd64        Proxy to communicate with QMI ports
u@u-Latitude-7320:~$