Support 3G/4G USB modem

[jonnor]

I had success on our testing device following this procedure. Would be nice to get in as an option in Ansible. Tested with a MyCall SIM (APN options and call differ a bit between providers).

apt-get install modemmanager network-manager

jonnor@dlock-2:~ $ sudo nmcli c add con-name "3G" type gsm ifname "*" apn "internet"
jonnor@dlock-2:~ $ sudo nmcli c mod 3G connection.autoconnect yes
jonnor@dlock-2:~ $ sudo nmcli c mod 3G gsm.pin "1234"
jonnor@dlock-2:~ $ sudo nmcli c up 3G

jonnor@dlock-2:~ $ sudo cat /etc/NetworkManager/system-connections/3G

[connection]
id=3G
uuid=73c872e7-b1ba-4d76-b3a0-2d7c58d0ee7e
type=gsm
permissions=

[gsm]
apn=internet
number=*99#
pin=1234

[ipv4]
dns-search=
method=auto

[ipv6]
addr-gen-mode=stable-privacy
dns-search=
method=auto

[jonnor]

I tried just copying in the file on a new file system, did not work. Needed to add the connection using nmcli, and set it to autoconnect, then could edit it in place.