The Kyocera Echo is a smartphone

Smartphone

A smartphone is a high-end mobile phone built on a mobile computing platform, with more advanced computing ability and connectivity than a contemporary feature phone. The first smartphones were devices that mainly combined the functions of a personal digital assistant and a mobile phone or camera...

 manufactured by Kyocera International of Japan, and distributed by Sprint

Sprint Nextel

Sprint Nextel Corporation is an American telecommunications company based in Overland Park, Kansas. The company owns and operates Sprint, the third largest wireless telecommunications network in the United States, with 53.4 million customers, behind Verizon Wireless and AT&T Mobility...

 in the United States. It runs the Google Android operating system. It was announced by Sprint on 7 February 2011, and released for sale 17 April 2011.

It is unusual in having two 3.5" screens that, when juxtaposed in "tablet mode" create one 4.7" screen. Sprint claims it as the "first dual-screen smart phone". When using the device, the screens can be used in four modes:

1. Tablet mode, where the two screens form one 4.7" image.
2. Optimized mode, where each screen shows a different part of one application. For example, one can open up "optimized applications" on the device such as email, where the top screen shows a selected email message and the bottom screen shows the user inbox.
3. "Simul-Task" mode, where one application will run on the top screen while a separate application runs on the bottom screen.
4. Single-Screen mode, where the device is folded and the bottom screen is concealed, making only the top primary 3.5" screen usable.