I justed upgraded to Ubuntu 16.04 LTS. Everything looks fine except the modem.

First, the modem connects but the icon doesn't change. It still shows 'disconnected icon'. Old computer shows right icon after connecting.

2nd, the connection shows 'EDGE' in bracket. On old computer connection shows 'HSPA'. This means browsing on the upgraded ubuntu in nearly impossible.

Lastly, on old computer when I unplug the modem I get the message "Network - disconnected you are now offline". On new version of ubuntu no message appears.

Not sure whether this is a problem with new hardware or with ubuntu. But it's definitely not a problem with the modem since same modem works perfectly on old computer.

Any idea?

Thanks.