Tablets offer two ways to go online: wirelessly or through a 3G (cellular) connection. Your Internet connection choice affects not only your overall cost but also the convenience and reliability of the Internet connection.
Wireless Internet connections for tablets
Wireless only tablets require a wireless network to connect to the Internet. That wireless network, called a Wi-Fi hotspot, might be your home network if you have one, or a public network such as you might find in a hotel, coffee shop, library, or airport.
Not every public hotspot is free; many hotels charge a fee for Internet access, and if you travel by train or ferry to work, they may charge a fee as well. Still, there are many public hotspots you can take advantage of — including some towns that provide free Wi-Fi throughout the area.
3G Internet connections for tablets
The second option for going online with a tablet is a wireless-plus-3G model. These devices can use a Wi-Fi network to connect to the Internet, but they can also connect through a cellphone provider’s 3G network. You will have to pay a monthly fee to your phone provider for using its 3G service, however using 3G allows you to go online wherever your phone provider’s network is available.
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Source:http://www.dummies.com/how-to/content/for-seniors-tablet-buying-decisions-wireless-or-3g.navId-323046.html
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