We've previously covered smartphones with a black and white e-Paper display usually placed on the back of the phone, while a traditional full-color display is placed at the front. Some models include Yotaphone 2 and Hisense A2, and the advantage of the e-Ink display is that you can extend battery life, quickly check notifications without unlocking your phone, reads book even in bright lights, etc.. but the cost goes up quite a bit since the manufacturers have to integrate two displays in their devices.
Hisense A5 does completely away with the traditional color display and replaces it with