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available in two versions. One of these, the Kindle Wi-Fi, connects to the Internet exclusively via Wi-Fi networks. The other version, considered a replacement to the Kindle 2, includes both 3G and Wi-Fi connectivity.* Improved E ink "Pearl" high contrast display==== Kindle DX Graphite ====This is an odd duck, with some technology from the Kindle 2 and some from the Kindle 3. * no wifi* half the system memory (128MB) of the Kindle 3 (256 MB).* DXG runs the same firmware as Kindle 2=== Fourth Generation Kindles ======= Kindle ====* 6 inch e-ink display* five hard keys, a cursor pad* on-screen rather keyboard* flash storage capacity of 2GB==== Kindle Touch ====* 6-inch E-ink screen* infrared touch-screen control==== Kindle Fire ====With it, you can read e-books using Amazon's popular Kindle software, download Android apps and games using Amazon's Appstore, purchase music using Amazon's MP3 store, and watch videos using Amazon's video on-demand and download services. * Android-based tablet* color touch screen* no 3G option* 7-inch screen== Whispernet ==Amazon has an agreement with Sprint so that the Kindle may use a Sprint cell tower free of charge for the Kindle owner. Within the U.S. use of Whispernet (Kindle accessing Sprint) is free. Webbrowsing is free, receiving of books and SINGLE-issue magazines are free.Whispernet makes use of the high-speed network established by the wireless cell phone provider Sprint. This network, in turn, uses EVDO technology, which is faster than other mobile wireless networks.When you activate a menu (by pressing the Menu button), your wireless status is indicated by a 1X or 3G icon that appears to the left of the wireless coverage bars on the top line of the Kindle screen. The Kindle uses the 3G network when it’s available; otherwise it uses the slower 1X RTT network.=== Web and Internet ===The Kindle isn’t a fully-functional Web browser, but it lets you browse Wikipedia and other text-oriented Web sites, where you can check your e-mail and perform other common functions. The Kindle gives you free wireless access to the Web. And you don’t have to pay a monthly fee to use your Kindle to go online. * [http://lockergnome.net/questions/109389/is-amazon-whispernet-really-free Is Amazon Whispernet really free?][[Category:PDA]]