We then recorded a baseline of the cellphone RF while on an active call with no case. And finally, we measured the reduction in that baseline still on the active call using a variety of different cases and RF reducing products — all at the same set distance from the phone. To account for fluctuations in the real-world cellphone signal, we recorded peak readings over a short period of time and then averaged a series of those readings over a longer period.

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We repeated our testing for each product later in the day to confirm repeatable results. This measured the RF that would be theoretically directed at your head if you used the phone properly with the case closed — listening to the call through the ear hole in the front cover.

This was intended to measure the RF that would be directed out of the back of the phone. This was intended to measure the RF out of the bottom of the phone case. This was intended to measure the RF that would be directed at your head if you used the phone with the case open and the screen pressed against your ear.

We tested the garments in a similar setup with the fabric between the phone and the meters. Each of the cellphone cases did substantially reduce the amount of RF coming out of the face of the phone, when the cases were used properly.

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Three of the four cases, Safe Sleeve, Defender Shield, and RF Safe, are intended to be used with the shielded front cover of the flip case closed over the face of the phone — even while on a call. Neuert points out that may not be intuitive for the average cellphone user. In one case, with the front of the flip case open and folded behind the phone — as most people use flip cases in the real world — the RF blocking cellphone case actually double the amount of RF coming from the face of the phone.

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We also tested the Pong cellphone case which was the only RF-Reducing cellphone case that does not utilize a shielded front cover. Neuert and other independent EMF experts tell us that was likely due to our proximity to the nearest respective cellphone towers.

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In a different location, or even facing a different direction, we may have seen different results. The study found that all of the radiation shields had no effect on the amount of radiofrequency radiation a cell phone user is exposed to from their phone.



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However, there are some things you CAN do to limit your exposure to cell phone radiation. A few of these include:. For a more complete list of ways to limit your exposure to cell phone radiation, read our article on cell phone health risks here. A few of these include: Having fewer and shorter calls on your cell phone Using hands-free devices or speaker phone mode instead of pressing the phone against your ear Avoiding phone calls in places with bad reception your cell phone emits more radiation to make up for poor signal strength For a more complete list of ways to limit your exposure to cell phone radiation, read our article on cell phone health risks here.