I just got a new Tata Docomo 3G Broadband Internet Connection, and they told me that I just have to insert the 3G USB stick and the computer will be connected to the Internet. But nothing is happening when I inserted the USB device (Dongle) in my Ubuntu, tried it in both Ubuntu 10.10 and 11.04

Please can you let me know how to enable Docomo 3G Internet in Ubuntu?