LG displayed an eco-friendly cell phone at the 2009 Mobile World Congress this week with a solar panel that had been built in to the back cover. Only needing natural light, if given 10 minutes of direct sunlight, the user can make a 3 minute call. The best part of the gadget is that it can be put on any LG phone. The company also has redesigned their packaging with recycled paper for the box and printed material.