This is a form of energy in the electromagnetic spectrum that falls between FM radio waves and microwaves. How do cell phones work?Ĭell phones send signals to (and receive them from) nearby cell towers (base stations) using RF waves. The main concerns have focused on whether cell phones might increase the risk of brain tumors or other tumors in the head and neck area, as these areas are closest to where the phone is usually held while talking or listening on a call. Since then, along with the large and still growing number of cell phone users (both adults and children), the amount of time people spend on their phones has also risen sharply.Ĭell phones give off a form of energy known as radiofrequency (RF) waves, so the safety of cell phone use has raised some concerns. Cellular (cell or mobile) phones first became widely available in the United States in the 1990s.
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