Who what why: How much gold can we get from mobile phones? - BBC News

"The business case is clear," he said, as he launched revised waste and recycling targets for the EU. "There's gold in waste - literally. It takes a ton of ore to get 1g of gold. But you can get the same amount from recycling the materials in 41 mobile phones."
http://www.bbc.co.uk/news/blogs-magazine-monitor-28802646