Hello, I had already made a post connecting a 3g modem via sakins3g and utms keeper which was a bit advanced or we can say tough…
here is another way to connect a modem using network manager…
- ssh or open terminal
sudo apt-get update
sudo apt-get install Network-Manager
sudo apt-get install modemmanager
sudo apt-get install ppp
sudo apt-get install usbutils
now insert your usb dongle in the usb port
wait till the usb modem gains singal
for example solid bluelight means 3g signal
solid green - 2g signal
solid red - no signal or not registered
this differs based on make and model.
after 30 seconds
nmcli dev status
your modem should be detected now like this
DEVICE TYPE STATE CONNECTION
ttyUSB2 gsm disconnected --
wlan0 wifi disconnected --
eth0 ethernet unavailable --
lo loopback unmanaged --
the gsm is ur modem…
NOW lets create your modem connection and configuration file.
sudo nmcli connection edit type gsm con-name "GPRS"
nmcli> print
you will see something like this
nmcli> print
===============================================================================
Connection profile details (My GPRS Connection)
===============================================================================
connection.id: My GPRS Connection
connection.uuid: 27b012ca-453f-482f-bc0e-c81bbab07310
connection.interface-name: --
connection.type: gsm
connection.autoconnect: yes
connection.timestamp: 0
connection.read-only: no
connection.permissions:
connection.zone: --
connection.master: --
connection.slave-type: --
connection.secondaries:
connection.gateway-ping-timeout: 0
-------------------------------------------------------------------------------
ipv4.method: auto
ipv4.dns:
ipv4.dns-search:
ipv4.addresses:
ipv4.routes:
ipv4.ignore-auto-routes: no
ipv4.ignore-auto-dns: no
ipv4.dhcp-client-id: --
ipv4.dhcp-send-hostname: yes
ipv4.dhcp-hostname: --
ipv4.never-default: no
ipv4.may-fail: yes
-------------------------------------------------------------------------------
ipv6.method: auto
ipv6.dns:
ipv6.dns-search:
ipv6.addresses:
ipv6.routes:
ipv6.ignore-auto-routes: no
ipv6.ignore-auto-dns: no
ipv6.never-default: no
ipv6.may-fail: yes
ipv6.ip6-privacy: -1 (unknown)
ipv6.dhcp-hostname: --
-------------------------------------------------------------------------------
gsm.number: *99#
gsm.username: --
gsm.password: --
gsm.password-flags: 0 (none)
gsm.apn: --
gsm.network-id: --
gsm.network-type: -1
gsm.allowed-bands: 1 (any)
gsm.pin: --
gsm.pin-flags: 0 (none)
gsm.home-only: no
-------------------------------------------------------------------------------
set gsm.apn <APN>
replace with your APN
for example
set gsm.apn bsnlnet
set gsm.username <username>
replace with your username
if you dont have any user name type user
set gsm.password <password>
replace with your password
if you dont have any type user
set connection.autoconnect true
this will make ur modem to get automatically connected.
nmcli print
this will display the changed made
save
quit
your device will be connected to network now… the modem light will be blinking.
wait… the system still wont be able to access the 3g internet as connman is handling the network connections … so we have to delete it
dpkg -l | grep connman-osmc
copy the name of the connman version and
sudo apt-get remove armv7-connman-osmc
in my case the version name was armv7-connman-osmc
replace the command with the version in ur system///
if u r doing all these on ssh it will stop in between as connman is removed…
dont worry wait for 5 mintues and reboot the osmc manually…
your modem will start working now… 
enjoy
if this doest work…
and if u dont have username and password for your 3g connection
dont set set gsm.username <username> and set gsm.username <password>
skip them… this will work on 95% of usb modems and if you have got a problem you can ping me…