Give your phone some space. It shouldn’t have been a big shock last week when the World Health Organization categorized cell phones as a possible “carcinogenic hazard.” User manuals typically advise against direct contact. Holding a cell phone 2 inches from your ear reduces the radiation “by a factor of four.”
Get wired. Using a wired earpiece can cut radiation even more. If you’re worried about low-level radiation emitted by the wire itself, minimize it by spending a few bucks on a ferrite choke. Avoid Bluetooth wireless earpieces, which emit radiation right at the ear.
Pick your spots. Few people can foreswear cell chats altogether. But do note that a phone emits more radiation when in motion or receiving a weak signal. Safest, in fact, are calls that you receive outside near a cell tower while standing perfectly still.