New iPhone Lacks Headphone Jack: Are Bluetooth Headphones Safe?

Apple's new iPhone 7 will not have a headphone jack, and so people who want to avoid holding their phones up to their ears must now rely on Bluetooth ear buds. It turns out that there is no evidence that Bluetooth does any harm. In addition, there are no plausible physics mechanisms by which Bluetooth could cause damage to a person's cells, said John Moulder, a professor emeritus and radiation biologist at Medical College of Wisconsin in Milwaukee.