yesterday I installed Ubuntu 12 in my sony vaio lappy. I have Huwaei E173 3G modem, simply inserted that modem into usb slot, after a few seconds modem started blinking finding as activated. I opened network profile and created a new network under 'Mobile broadband' tab everything was automated and I felt awesome, infact I used net for a while. Next morning, I placed modem into usb, nothing happened, no sign of modem presence even but modem is blinking, I tried creating a new connection once again but attained no luck. Kindly help me in resolving problem. regards sandy