I want to share about "how to usethe usb modem in Ubuntu"
1. install usb modeswitch
2. install wvdial
-----When all was installed in ourubuntu----
1. plug your usb modem, wait until themodem icon appears on the desktop.
2. right click on the icon, select"eject"
3. open a terminal, type
fxlovers @ fxlovers-laptop: ~ $ lsusb
Bus 005 Device 001: ID 1d6b: 0001 LinuxFoundation 1.1 root hub
Bus 001 Device 001: ID 1d6b: 0002 LinuxFoundation 2.0 root hub
Bus 004 Device 001: ID 1d6b: 0001 LinuxFoundation 1.1 root hub
Bus 002 Device 007: ID 2015:0001 <====see this section, this is information about the modem that we use
Bus 002 Device 001: ID 1d6b: 0001 LinuxFoundation 1.1 root hub
Bus 003 Device 001: ID 1d6b: 0001 LinuxFoundation 1.1 root hub
4. type
fxlovers @ fxlovers-laptop : ~ $ sudo modprobe usbserial vendor = 0x2015 product = 0x0001
vendor = 0x2015 product = 0x0001 <===change value in accordance with your modem information
5. type
fxlovers @ fxlovers-laptop: ~ $ sudo gedit / etc / wvdial.conf
setting according to the operators.
6. type
fxlovers @ fxlovers-laptop: ~ $ sudo wvdial
done.