Over 1 billion new cell phones are sold worldwide on a yearly basis, and that number continues to grow annually. That means roughly 1 billion old cell phones have come to the end of their first life. Most are in perfectly good working condition and end up back with the carrier through upgrade or take-back programs. Now if you're a carrier, you know storing these EOL products is a costly, logistically impractical solution, and dumping them is a hazardous, socially irresponsible one. What other option is there?