Sprint has yet to announce an exact release date for the Echo, though given that it has just passed the FCC, we might be getting closer to it hitting store shelves.
The Kyocera Echo for Sprint is the first dual-screened Android phone. It allows you to use both screens for different apps, or both screens to stretch an app to a higher resolution view of the onscreen elements. Each display is WVGA resolution, which will provide you with a big windows of content when viewing the web, browsing email, and doing other tasks. When we went hands-on with the Echo at the Sprint event, the device felt a bit laggy and unfinished.