With a phone without BT it would be tricky indeed. But even with a USB modem you would need to purchase a contract and data plan, if you want to connect to a non-wi-fi network while on the go, and then there's the prohibitive power requirements of such modems (although people have experimented with using small add-ons or battery-powered mini-hubs). The alternative is to look for wi-fi hotspots, if there are any in your area. At home, if you have an internet connection, you could get a wi-fi router and you would be online with your N810.