I would like to use the 3G connection on my android with my Ubuntu. Is there any method to do so?
Easy Tether from Mobile Stream should work. It's a way to share your internet connection with another device via USB. Get the Lite version (does not support https, or tethering to gaming consoles) or the Full version.
Supports Windows 7/Vista/XP (32-bit and 64-bit), Mac OS X 10.7/10.6/10.5/10.4, Ubuntu 10.4+ and Fedora 13+
Full version supports the following:
Tether PS3, Wii, XBox via PC Internet Connection Sharing, you need a computer for game console tethering.