If you get a 3G equipped tablet, then in order to go outside of your WiFi range, then yes it will require some sort of data plan. There are some plans that are pay-as-you-go where you buy packs of data and others that give you month to month service. I have a WiFi only tablet and can only go online at home or where there is a WiFi signal. Nowadays though there are more and more free WiFi spots available. Which is great for me.