http://yotadevices.com/#yotaphone
http://www.theverge.com/2014/2/28/5450258/yotaphone-e-ink-dual-display-prototype-smartphone-photos
YotaPhone is an Android smartphone with a regular touchscreen on one side and an E Ink display on the other. It's been around for well over a year now, and in our time with previous prototypes we've been impressed with its premise, if not Yota Devices' execution. At MWC this year, the Russian carrier-turned-manufacturer is showing off an all-new prototype it believes solves many of the original model's flaws.
The new YotaPhone improves over its predecessor in many ways. The original's 4.3-inch 720p display is now a 5-inch 1080p unit, and its blocky corners have been replaced with smooth curves. All of the specs you'd expect to improve have: it has a quad-core processor in place of a dual-core, a thinner profile, a lower weight, and runs the latest version of Android. Its E Ink display is also massively improved; it's larger, has smaller bezels, higher pixel density (up from 170ppi to 235ppi), and is far more integrated into the overall design. It's so integrated, in fact, that when the E Ink display is showing a black image it's almost impossible to tell the display apart from its surrounding bezels.
Basically it's a phone with a normal LCD display in the front and an e-ink display at the back, which is usually only used in e-readers & some smartwatches.
So, what do you think of it? Personally I quite like it and can't wait for full reviews.