cannot connect with huawei e173 after upgrade to 12.10 using network manager
This happened due to bugs(or bug) in the ModemManager 0.6.0.0 which shipped with Ubuntu 12.10. You can remove this modem manager version and downgrade in to 0.5.2.
To check modem manager version : dpkg -s modemmanager
download 0.5.2 version : link 64 --- i386