Every retailer that takes back rechargeable batteries, most likely accepts mobile phones, as do most wireless providers. For computers, cameras, televisions and other it's worthwhile to do a little homework because some stores charge fees depending on item and brand. Check out Best Buy, Staples and Office Depot to see what's the best fit. Some places, like Radio Shack, have trade-in programs where you can receive store credit for your old gadgets. Click here for information on other stores that take computers, cell phones and other e-waste.