Russian device maker Yota Devices has launched its first-generation Yotaphone dual-screen smartphone in India at Rs 23,499. The phone is being distributed by Jumbo Eletronics, Dubai and will be sold exclusively on e-commerce marketplace Flipkart starting October 17. The phone was launched globally in December 2013.
YotaPhone has a 4.3-inch LCD display with 1280x720p resolution on one side and a 4.3-inch 640x360p E-Ink display on the other. The LCD screen is for using the handset as a smartphone, while the E-Ink panel allows it to be used as an e-reader.

This type of screen is also used in e-readers like Kindle and Kobo and does not affect eyes adversely.
Phone is nice in looking but not safe as it has screen on its both sides.
Also it a bit costly when compared to other phones in the market.