Re-connect the USB modem to the first USB plug.Right-click on each entry in Universal Serial Bus controllers and choose “uninstall”.Go to My Computer → Properties → Hardware → Device Manager.Hence, no modem was installed as far as Windows is concerned: The problem was that during installation Windows didn’t recognize the modem’s data interface. If you see an error that “the device has been disconnected or is unavailable” when you try to connect, the following might help. Once you’ve found an USB plug that works, always hook up the modem to the same plug. Always log in with a user account that has local admin permissions.Ģ. How to fix “the device has been disconnected or is unavailable”ġ. I was using the Huawei E220 model but I guess the software/firmware related issue apply with other models, too. Below I present a list of steps to try out or hints to consider if you run into issues installing the drivers and/or software such as the error “the device has been disconnected or is unavailable”. Thousands of people are having troubles with those Huawei USB modems (assumption based in search engine results and forum posts).
