Comment 461 for bug 446146

@Martin Wildam: Here is need explained answer, so let me describe my short story. I bought my first 3g modem in the last December. Network Manager detected it without any problems. Then I used it often for a couple of week.

It started to work anyhow after some time. Sometimes it was detected after reboot, sometimes on specific usb port. The modem even was not always detectable.

Then I didn't use it more than a month. I checked it recently, now the modem is detected from any USB port.