I acquired a 3G Mobille Broadband – Huawei E156G – USB Dongle and really wanted to get it going on my Linux (Ubuntu) laptop. After much looking around and trying several unsuccessfull ways of doing it found a very easy and working solution.
Basically Linux will recognize your Huawei E156G USB Dongle and you can check that by listening to your USB devices, just run the following command on yor terminal lsusb this should output something like this:
Bus 005 Device 002: ID 12d1:1003 Huawei Technologies Co., Ltd. E220 HSDPA Modem
Bus 005 Device 001: ID 0000:0000
Bus 004 Device 001: ID 0000:0000
Bus 003 Device 001: ID 0000:0000
Bus 002 Device 001: ID 0000:0000
Bus 001 Device 001: ID 0000:0000
if this is working, follow the tutorial on this post 3G Mobile Broadband with Ubuntu-EEE
