I use a small, no-frills Navi C1 handset every day, but the back-lit display leaves my eyes tired after long calls and SMS sessions. I want to swap that display for a grayscale or colour E Ink panel so the phone becomes as gentle on my eyes as an e-reader... (Budget: £20 - £250 GBP, Jobs: 3D Printing, Circuit Design, Electronics, Embedded Systems, PCB Design and Layout, Product Development, Prototyping, Signal Processing, Technical Documentation, Visual Design)