Amazon Kindle 3G Review

Wireless Connection

Wireless access is made by the Amazon Whispernet service, which delivers content to the Kindle wirelessly anywhere, anytime. This function is integrated on all last generation Kindle devices. The model we tested also includes free 3G connectivity.
The Kindle connects to any Wi-Fi, which allows you to send material straight  from Kindle Store to the device, no computer required.
In Kindle models with free 3G connectivity, like the one we tested, the 3G works just like a cell phone within its coverage area. When the 3G signal is not strong enough, the 3G+Wi-Fi Kindle models automatically connect to the slower networks EDGE and GPRS. When the signal is strong enough, they automatically connect to the fastest 3G network.
3G coverage is automatically disabled as soon as a WiFi connection is made. If you disconnect or move to an area away from Wi-Fi, Kindle will automatically revert to 3G coverage.