There are obvious drawbacks to a smartphone that utilizes a display based on E Ink technology, but there are also some clear advantages. While the phone’s user interface and video playback both take a hit, the panels in eReaders like the Kindle and Nook are visible in any light and they required just a fraction of the power needed to fuel modern LCD and AMOLED displays. E Ink, the company behind the paper-like display technology, debuted a prototype of an Android-powered smartphone at the Mobile World Congress trade show this week, and Laptop reports that the unit can run for a week on a single charge. Another image of the prototype E Ink phone follows below, and Laptop’s full impressions can be found through the source link.