Here is a profile of the Kyocera Echo when open. Kyocera said it worked hard on the pivot hinge design to ensure durability. Overall, we though it felt relatively sturdy, though closing the device wasn't the smoothest.
There are several modes in which you can use the Echo: Standard, optimized, tablet, and simultasking. This is a view of the e-mail application in optimized mode. On the left screen, you get view of your full inbox and on the right is the full text of a single message.
When combined, the two touch screens provide a total of 4.7 inches of view space. Most apps, such as Amazon Kindle for Android, are designed to work in tablet mode so you can view everything on both screens.
The real beauty of the Kyocera Echo may lie in the multitasking capabilities. In simultasking mode, you'll be able to use two apps currently on both screens. However, at launch, it will be limited to just seven applications.
The Kyocera Echo will run stock Android 2.2. The smartphone will also have a 1GHz Snapdragon processor, 1GB internal memory with an 8GB microSD card preinstalled, and mobile hot spot capabilities. However, it will be 3G-only.
Here is CNET's full site shown across both screens. Kyocera and Sprint said it worked hard to minimize the seam between screens so it would provide a good user experience. It was certainly better than what we were expecting, but it still took a bit of getting used to.