By Richard Cristdahl, OMD, This email address is being protected from spambots. You need JavaScript enabled to view it.


You’ve probably seen children, even toddlers on Television talking on a cellphone; they’re in advertisements smiling and having fun. So how old do you think your child should be to have a cellphone? Do you think cellphones are safe for children? Before you answer these questions let’s discuss some preliminary questions that you might not ask or know about like: How cellphones are tested for safety? What are they testing for? And why they use these tests?


Federal Communications Commissions (FCC) allows two different methods for certifying cellphones, Specific Anthropomorphic Mannequin (SAM) and Finite-Difference Time-Domain (FDTD). Testing a cellphone with SAM they use a plastic head, patterned from a 6’ 2” 180 pound man, representing about 3% of the U.S. population. A homogenized liquid containing 40 tissue samples of the head is poured into a hole at the top of this head and an electric probe is positioned within the hole. The cellphone to be certified is clamped to SAM approximately one-half-inch away from its head. They’re testing electric field intensities for Specific Absorption Rate (SAR), or how much radiation is absorbed into the soup within the head. If the maximum absorption is at or below the exposure limit of 1.6 W/kg, a threshold for heating the body, the phone is certified for sale. There is a ±30% tolerance of the SAM certification process. SAM doesn’t test for any specific organ, gland, or tissue just the soup. SAM doesn’t differentiate between men, women or children and is the only test ever used for cellphone certification.


FDTD testing is a computer algorithm and for decades has been the best way to simulate the amount of absorbed microwave radiation in tissues. In 1997 the FCC stated, “Currently, the finite-difference time-domain algorithm is the most widely accepted computational method for SAR modeling”. The Food and Drug Administration (FDA) uses FDTD for testing medical microwave treatment devices. FDTD tests using the “Virtual Family” and can test for: any age either male or female, even pregnant with fetus; any body part or organ, eyes wearing glasses with or without metal frames; breasts in a bra with or without metal stays; glands and different tissues. FDTD costs less than SAM, and has never been used to certify cellphones. So why does the TCI choose a more expensive testing, one that is less accurate, can’t test the difference between men, women or children, and can’t test tissue, organs or glands? There’s no way to know for sure so I can only speculate trying to use common sense and some facts.

The TCI’s choice of size, inaccuracy, and SAM representing only large males, it’s reasonable to think they would rather test something that can absorb more radiation so their phones can be more powerful and still pass testing. Having a more powerful cellphone means better reception, less dead zones, and fewer dropped calls, creating a more desirable product.


If the TCI used FDTD and tested children and women, there could be cellphones that would not be certified or would have to have warning labels for these population groups that have higher absorption rates than large men. If organs, glands and tissue were tested especially brain tissue and parotid glands warning labels might be required stating how close a phone is to be held to your head. It’s reasonable to conclude that they’re cellphones being sold today that couldn’t pass the FCC “Safety Guidelines” if the FDTD testing was used. TCI uses the FCC “Safety Guidelines”, which allows cellphone certification if radiation intensities don’t heat your body within six-minutes of use.

May 30, 2011 The World Health Organization classified EMF/RF radiation a Class 2B Possible Carcinogen. May 27, 2016 our Governments National Toxicology Program completed $25 million rodent study initiated by the FDA that connected cell phone use to cancer. All this coupled with the TCI’s resistance to put warning labels on their cellphones denoting safe usage and in light of all the studies showing adverse health effects; it’s now time to educate yourselves and take action for your children’s safety. If you feel your child absolutely needs a cellphone please consider a 3G cellphone used only on an as needed basis. These phones radiate only when you’re talking, texting when sending or receiving, whereas a 4G phone radiates constantly. Cellphones are not safe for children and parents should wait one year after menarche or voice change before getting your teenager a 3G cellphone and monitor their use.

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