The second screen on its back contains e-ink that stay "fixed" even without power, saving battery life. It can also be used as a traditional e-reader, performing better in broad daylight than typical LCDs.
In reading mode the phone can last 7 to 10 times longer than other smartphones. The phone is going to cost about 500 euros ($680), with a U.S. launch date unknown.
We also recommend watching: "Phonebloks: The Open-Source Modular Smartphone" and "Samsung and Qualcomm: The Smartwatch Revolution to Replace the Smartphone".
YotaPhone: The E-ink Display Phone
Yota is a Russian mobile broadband services provider and smartphone manufacturer. Yota is a trademark of Skartel LLC. On May 9, 2012, Yota's WiMAX was replaced by its LTE network. Garsdale Services Investment Ltd owns of 100% of the Yota shares and 50% of the MegaFon shares. Garsdale itself is 82% controlled by AF Telecom, 13.5% by Telconet Capital, and 4.5% by the Russian Technologies State Corporation.