In my case upgrading from 9.10 to 10.04 also solved the problem, since now network-manager works with my Huawei 3G modem and I don't need to use wvdial anymore.
In my case upgrading from 9.10 to 10.04 also solved the problem, since now network-manager works with my Huawei 3G modem and I don't need to use wvdial anymore.