We toss tens of millions of mobile phones each year, yet only 2 percent of those ever get recycled, says the nonprofit Earthworks. The group just released a report card (PDF) that gives the thumbs-down to major carriers' lazy telephone-takeback programs. Verizon gets the best grade--a dismal C minus, and Cingular trails with a D. Sprint and T-Mobile fail altogether. And while we originally recommended ReCellular, that service has not yet pledged that its goods won't be dumped overseas. The good news? You can find this list of electronics recycling services that vow not to export toxic electronics waste and more options in our "Trash your old tech" story.