With the old karmic kernel (2.6.31-19-generic), the Huawei E180 does get detected as a 3G modem (and CD-ROM drive at the same time), and I can connect to XS4ALL (not T-Mobile). On the first attempt it always fails, then I have to unplug the modem, enter login credentials and PIN code in the settings, and plug it in again.
With the old karmic kernel (2.6.31- 19-generic) , the Huawei E180 does get detected as a 3G modem (and CD-ROM drive at the same time), and I can connect to XS4ALL (not T-Mobile). On the first attempt it always fails, then I have to unplug the modem, enter login credentials and PIN code in the settings, and plug it in again.
This could be a kernel issue related to #520372 .