The takeaway: Moskowitz offers an extensive list of steps you can take to reduce radiation exposure, including: 1.) Keep your distance. Keep your cellphone or cordless phone away from your body when it's powered on, taking special care to maintain distance from your head and reproductive organs. Use your speakerphone or a wired headset, or text instead of calling. 2.) Wait for a good signal. Your cellphone emits more radiation when the signal is poor, so avoid using it while in enclosed metal areas such as elevators, cars, buses, trains or planes. 3.) Avoid secondhand exposure. Reduce the time you spend in places where a lot of people are packed together and using cellphones. 4.) Turn off your phone. Turn off your cellphone when not in use, or switch to airplane mode.