When the Huawei is plugged in, it falls in a USB-Card Mode where the Modem is turned off. Under Windows, the connection manager of the Stick would turn on the modem, but as we are under Linux, there has to be another trick:
First, install usb-modeswitch and usb-modeswitch-data
sudo apt-get install usb-modeswitch usb-modeswitch-data
Pull the stick out, wait a couple of seconds and plug it back in. The connection manager should now be able to see the stick and connect to it.
IF you are unable to connect because the stick is sim-locked, you can go to http://entsperren.at/unlock_huawei.php and enter you IMEI. Then, under the Mac-Tab, choose . Now, open an terminal and pull your Stick out, wait and plug it back in. Wait a bit and enter “dmesg”. You are looking for a line like this: “usb 1-4: GSM modem (1-port) converter now attached to ttyUSB3”.
In the terminal, enter:
You should now have a blank terminal. Enter “AT”. If you got back “ok”, the connection works fine. Enter “AT^CARDLOCK=”unlock_code””, replace the unlock_code. It should now say ok, an thats all.