Comment 13 for bug 1042456

It seems like the modem disconnects right after it has connected. I see that the signal level is 2 of 5. What happens if you try to set the connection to use only 2G or 3G?

There is work underway upstream to support connecting to the modem using QMI protocol, but that is probably not ready at earliest for Ubuntu 13.04. It will probably improve performance, but it seems like the modem should work without also.