I've just learned that cell phone providers sell a small USB device that plugs into a netbook/laptop and gives it 3G/4G connectivity. I'm not even sure what this USB device is called. My only concern is that my netbook runs Ubuntu Linux rather than Microsoft Windows. Does a USB device such as this work with Linux netbooks/laptops without the need to install drivers? It would be nice to not have to maintain a mobile phone just so my netbook can have 3G/4G connectivity via a mobile hotspot.