This question is an exact duplicate of:
I bought a new D-Link 3G modem and it said it supports Linux. But after I installed it, I still can't make the device work on Ubuntu 13.10.
I used the .deb file from the D-link modem 3g_modem_connect_DWM156_amd64.deb (from the modem itself) but I was unable to configure it. I searched the Internet, they use dlinkusbmodem.deb file, which is a file from 1 year ago. Even after I dpkg it, I still don't know how to proceed.
I've used every method in the askubuntu, it don't work with this file version.