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Most smartphone guidelines tell consumers not to keep their phone directly against the body. ~Danielle Dellorto

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The good news is, even critics of the FCC's current cellphone radiation guidelines do not suggest people stop using their devices. Instead, they offer common-sense precautions.

Here are the basics you need to know:

Your phone radiates like a microwave. Smartphones today have multiple antennas inside. When in use, the phone emits non-iodizing radiation — not the type you would get from an X-ray; more like a low-powered microwave oven.

"Phones are transmitting radiation so long as they are connected to the Internet or connected to Wi-Fi, and even if you're not talking on your phone, your phone is talking to the tower," Dr. Devra Davis, a former White House senior health adviser, said.

Be aware that your phone is, in essence, always transmitting. Experts suggest that if you plan to watch a movie on your device, download it first, then switch to airplane mode while you watch in order to avoid unnecessary radiation exposure.

Distance is your friend. Chances are you have not read the fine print of your cellphone safety manual. Most of them tell consumers not to keep their phone directly against the body.

The Samsung Galaxy S6 manual reads: "Body-worn SAR testing has been carried out at a separation distance of 1.5 cm [.6 inches]. To meet RF [radio frequency] exposure guidelines during body-worn operation, the device should be positioned at least this distance away from the body."

Bottom line: if you're carrying your phone in your pocket, sock, bra or anywhere against your body, the manufacturers can't guarantee that the amount of radiation you're absorbing will be at a safe level. Distance is your friend.

I read elsewhere that Apple has patented a distance-from-head sensor so that future models can remind people to keep the 4cm distance they recommend.  Presumably the plan is to mitigate the liability when the cancer lawsuits start flying. 

It will also probably help a lot of people to not get cancer.

I wonder why it took them so long to address this issue.

I wonder why no one had reported this issue before.

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