Setting up PPP on the Pi/Ubuntu for use with MTQ, MTC, MTD, and other basic celluar modems
Commands (as root): apt-get install modemmanager network-manager network-manager-pptp systemctl enable ModemManager systemctl enable NetworkManager Reboot and confirm that modem manager is running and detected the modem using: mmcli -L Check the details of the modem (including that the SIM is detected, if relevant): mmcli -m 0 (if 0 is the modem's number from the mmcli -L command) You should see state: 'registered' in the "Status" section. Create and bring up the connection: nmcli c add con-name "dragonfly" type gsm ifname "*" apn "YOUR APN HERE" nmcli c up dragonfly Should see something like: "Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/18)" If that did not work check your APN. Change it using: nmcli c modify "dragonfly" gsm.apn "YOUR APN HERE" Check that you have an ip address on wwan0. You may need to run dhclient wwan0.