My MF636 was also disconnecting after about 10 minutes consistently but is now working reliably. Checking /var/log/dpkg it seems that many packages were updated recently including udev and libgudev.
In my case I insert the modem, eject the USB drive, wait a few seconds then run sudo wvdial to establish a connection. Performance is the same as when running under WinXP. My thanks to all the unsung heroes who are responsible for 9.10 - it's GREAT!! -- ZTE MF636 3G modem cannot used in Karmic https://bugs.launchpad.net/bugs/408555 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs