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Mobile phones use radio frequency (RF) radiation to transmit signals. This is a much lower frequency than known forms of carcinogenic radiation, such as X-rays, but experts have debated whether these radiation waves are harmful to humans.
As a precaution, US regulators have defined the maximum amount of radiation that devices can launch, but tests of the Chicago Tribune have revealed that the iPhone 7, the Samsung Galaxy S8 and many other models could exceed these limits .
For the FCC, the radiation limit for mobile phones reveals that devices should not release more than 1.6 watts per gram of tissue on average.
The radiation has the ability to penetrate the skin and damage the DNA. This genetic anomaly can cause cancer and other health problems if levels and duration of exposure are significant enough.
Studies of people working near higher radio frequencies showed that they were at a higher risk of developing certain cancers.
Studies in mice have shown that radiation can increase the risk of heart and genital tumors, but it is strange that male mice exposed to radiofrequency have also lived longer than mice not exposed to radiation.
Until now, however, RF radiation has not reached the threshold of being considered a "possible carcinogen" for humans.
However, the FCC requires all smartphone manufacturers that they demonstrate that their devices do not emit more radiation than what is considered safe before being put on the market.
California did not trust these limits and smartphone security, like expert groups: the Environmental Working Group (EWG).
To examine each side, the Chicago Tribune has done its own testing by placing all 11 models of Apple, Motorola, Blue and Samsung smartphones in two different sizes – 5mm and 2mm. – Materials that mimic human tissue.
The study also tested phones at a distance of 2 mm, to simulate the distance between devices in the pocket.
From the pocket, the iPhone 7 emits 2 to 4 times more radiation than allowed by the FCC principles. At worst, the Galaxy S8's radiation was twice the legal limit, suggesting that the FCC test protocol is not enough.
The FCC said it will study the testing practices of smartphone companies.
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