I installed Ubuntu 12.10 on 2 disk partitions and installed MTS MBlaze usb modem on both the partitions.
When I start any of these 2 partitions, I get the message "Connection Established", but "Modem Manager crash" message in both of them, and I can't open any web page, nor ping 188.8.131.52
MTS is working fine in Ubuntu 12.04 partition.
Is this Ubuntu 12.10 bug, or something particular with the new version?
I manually downloaded wvdial and its dependencies, installed and finally it is running.
Thanks to all of you for support.