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Your iPhone 11 Pro Emits Twice the Amount of Radiation for Safe Use via Popular Mechanics

Should you be worried?

By Courtney Linder

  • RF Exposure Lab in San Marcos, California found that the iPhone 11 Pro emits over twice the FCC’s legal safety limit for radiofrequency radiation from a cell phone.
  • The testing builds on former investigative work by the Chicago Tribune, which also found that an iPhone 7—and other smartphones— exceeded federal radiation levels.
  • It all points to how old the FCC’s testing standards are for radiofrequency radiation—as in, they’re way older than our smartphones are and should be updated.


RF Exposure Lab, an independent laboratory in San Marcos, California, tested the iPhone 11 Pro for radiofrequency radiation (RF) and found the levels were twice as high as federal safety limits and far different from what Apple had previously reported.

The lab found the smartphone exposes users to a Specific Absorption Rate—how much the body absorbs radiofrequency energy—of 3.8 watts per kilogram. Meanwhile, the Federal Communications Commission (FCC) has set the maximum exposure rate at 1.6 watts per kilogram.

That’s certainly cause for concern, considering that the World Health Organization has classified RF radiation as a possible carcinogenic to humans since 2011 and the National Institutes of Healthhas found “clear evidence” in animal studies that RF radiation causes cancer. Plus, the radiation has been linked to lower sperm counts, headaches, and effects on learning and memory, hearing, behavior and sleep.


“However, when we bought an iPhone ‘off-the-shelf’ and tested it the same way, RF Exposure Lab found it fails the FCC’s safety limit,” McCaughey added. Such is the case in a previous August 2019 Chicago Tribune investigation, which inspired the Penumbra-sponsored study. The Tribune found that the iPhone 7 similarly had double the rate of radiation that the FCC deems safe for use and other smartphone makers, like Samsung and Motorola, also exceeded the safety threshold.

The real reason behind the conflicting results is likely that the FCC’s guidelines for setting safe radiofrequency radiation levels are extremely old.

“The FCC limits are over 20 years old,” McCaughey told IEEE Spectrum. “Some might argue that the limit is antiquated at this point.” The FCC set its radiofrequency radiation standards some 25 years ago, he said, long before smartphones were even a thought.


To protect yourself, the FCC doesn’t necessarily recommend that you burn your new iPhone and trade it in for another device. After all, most phones won’t operate at their highest power capacity at all times, so radiation measurements are somewhat variable.

Instead, if you want to reduce your exposure to radiation, hold your cell phone away from your body (especially your head) by using the speakerphone setting while talking, or some other hands-free accessory, like AirPods. In addition, don’t carry your cell phone in your pocket, and if you’re in a low service area and have, say, one bar of service, wait to make the call until later—your smartphone will use more power to try to find reception, increasing the radiation output.

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