Problem with connecting mobile broadband in Ubuntu 14.04

Solution 1:

Solution that works for me:

• First stop modemmanager by sudo stop modemmanager.
• Then plug net-setter & wait for 20-30 seconds.
• Then start modemmanager by sudo start modemmanager

Now when modem (net-setter) detected ; it is stable hence, after connecting, I get stable connection until disconnect or unplugged!

But it is not permanent solution as I have to follow above method each time to get stable connection. So, any other solution will be appreciated.

Note that : Directly restart modemmanager by sudo restart modemmanager not helpful for me.

Additional info: Actually there is no need to start/stop service network-manager entirely. Only go for modemmanager.