Most cell phones contain toxic metals (such as lead and cadmium) that may create environmental harm when disposed. Cell phones are prohibited in landfills. Just take them into your local mobile phone store for recycling. As of July 2006, businesses selling mobile phones must accept all cellular phones from consumers for recycling.
San Bernardino County’s Household Hazardous Waste Program accepts resident’s cell phones at its collection facilities in Apple Valley, Barstow, Big Bear Lake, Joshua Tree, Trona, and Victorville http://www.sbcfire.org/hazmat/hhwcollection.asp#ABOP%20Facilities
You may be able to repair, sell or donate your cell phone. ReCellular buys and sells used phones http://www.recellular.com/recycling/faqs.asp They also arrange donationshttp://www.recellular.com/recycling/donatePhones.asp
California’s Department of Toxic Substances Control estimates that 27 percent of California’s cell phones were recycled in 2009.