Gabriel Alejandro López López (Software Engineer)

Step-by-Step Guide: Enabling WWAN on ThinkPad P50 Ubuntu

- Discover the steps to set up mobile broadband on Lenovo ThinkPad P50 using Ubuntu. Our guide simplifies the WWAN activation process, ensuring a hassle-free experience for users.

If you’ve encountered issues with the default deactivation of WWAN on your Lenovo ThinkPad P50 after a fresh Ubuntu install, this guide will walk you through the steps to activate it. This is a personal reminder on the commands required to activate this feature based on discussions in this Ask Ubuntu post where it’s explained that WWAN is deactivated by default.

Activate the Modem

To enable the Lenovo shipped EM7455, use the following command:

sudo ln -sft /etc/ModemManager/fcc-unlock.d /usr/share/ModemManager/fcc-unlock.available.d/1199:9079

Setup the Mobile Broadband Connection

The next step is to create the Mobile Broadband connection using Network Manager GUI or nmcli. In order to do it with nmcli, first we need to identify the available modems:

$ mmcli -L
    /org/freedesktop/ModemManager1/Modem/0 [Sierra Wireless, Incorporated] Sierra Wireless EM7455 Qualcomm Snapdragon X7 LTE-A

In this case, there is only one modem (indexed as 0). Now, identify the device:

$ mmcli -m 0 | grep "primary port"
           |         primary port: cdc-wdm1

Creating the Connection with nmcli

And now we are ready to create the connection. For my actual service provider the required command is:

$ nmcli connection add type gsm ifname cdc-wdm1 con-name Cubacel apn nauta
Connection 'Cubacel2' (906f5b4f-b37b-4eff-b8eb-5c13dc9c532b) successfully added.

Values of the command:

The name is just a friendly identifier.

Activate/deactivate the connection

To activate this connection the command is:

$ nmcli connection up Cubacel
    Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/21)

And to deactivate the command is:

$ nmcli connection down Cubacel
    Connection 'Cubacel' successfully deactivated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/21)

Remove the connection

If you want to remove the connection:

$ nmcli connection delete Cubacel
    Connection 'Cubacel' (7478c2fb-6d85-443d-ab67-2b812b761460) successfully deleted.


Using image from licensed with CC BY-SA 2.0.