Wi-Fi transmissions consist of sequences of RF burst signals or pulses ranging in duration depending on the amount of data being carried by a pulse(15). The proportion of time that Wi-Fi transmits RF signals is called the duty cycle. Joseph et al.(14) in measuring Wi-Fi in 176 different urban locations (outdoors, homes, offices) found a median duty cycle of 1.4% over all the measurements. Particularly in schools, Khalid et al.(10) in measuring Wi-Fi in six schools found a mean duty cycle from the access points of 4.8%. In our study duty cycle was measured separately for the 2.45 and 5 GHz transmissions when performing the stationary Wi-Fi measurements in the centre of the classroom. The median duty cycle for 23 schools that were measured in the current study was 6.3 and 2.4% for 2.45 and 5 GHz transmissions, respectively.
Disclosure: This post is brought to you by Business Insider's Insider Picks team. We aim to highlight products and services you might find interesting, and if you buy them, we get a small share of the revenue from the sale from our commerce partners, including Amazon. Jeff Bezos, CEO of Amazon, is an investor in Business Insider through his personal investment company Bezos Expeditions. We frequently receive products free of charge from manufacturers to test. This does not drive our decision as to whether or not a product is featured or recommended. We operate independently from our advertising sales team. We welcome your feedback. Have something you think we should know about? Email us at insiderpicks@businessinsider.com.
Years later, a study that Leszczynski described as a “game changer” discovered that even phones meeting government standards, which in Europe were a SAR of 2.0 watts per kilogram, could deliver exponentially higher peak radiation levels to certain skin and blood cells. (SAR levels reached a staggering 40 watts per kilogram—20 times higher than officially permitted.) In other words, the official safety levels masked dramatically higher exposures in hot spots, but industry-funded scientists obstructed research on the health impacts.45
Legal Disclaimer: EWG's cell phone database is dynamic, which means that the cell phone ranking numbers may change based on evolving science, new information on SAR radiation exposures, market conditions, or other factors. Please be advised that EWG does not recommend that companies create marketing materials based on the EWG rating system, given that the rankings may change as the database is updated. EWG makes no representations or warranties about any of the products rated on this site. EWG hereby disclaims all warranties with regard to the products on the site, including express, statutory, implied warranties of merchantability, or fitness for a particular purpose.
This Samsung Galaxy S8 LED Wallet Cover is a multifunctional case that stores cards in the interior pocket and shows you LED notifications on the outside. On the front cover the LED lights will notify you of incoming calls, messages, current time and more. Simply press the phone's power button with a closed case to get all your information. Answer or reject calls by swiping the cover.
37. Be careful when sharing your phone number. Teenagers may be so excited to finally have their own cell phone or smartphone that they immediately give out their number to everyone they know – or worse, publish it online on their social media profiles. “Only give out your phone number to people you know for sure you can trust.” – Sameer Hinduja, Ph.D. and Justin W. Patchin, Ph.D., Cell Phone Safety Ten Tips for Teens, Cyberbullying Research Center; Twitter: @onlinebullying
I am a mother of two children. Since two years i have noticed a dis concentration in all my work and at home also. My 2 kids constantly keep crying and are do not listen to me. The problem is that we have sharing same room with my hubby and my two children(a boy 4 years and girl 1 year). I have a wifi router inside my room where there is always 2 smartphone and 1 tablet connected to wifi all the time. i have read your article and is now worrying about mine and family health. My hubby and i can hardly wake up early in the morning. i want to look for a solution. As i have 2 growing baby brain. For me really i cant see the side effect on my health. i constantly forget everything and can hardly recollect so as my hubby. kindly advise me..
We’ve rounded up 50 valuable tips from experts on mobile devices, wireless, safe Internet usage, and more to help you get the most from your cell phone. Play it safe by using your device when it’s safe to do so, avoiding calls and texts from anonymous numbers to steer clear of phishing and other scams, learn strategies for monitoring your kids’ cell phone use to stay on top of potential problems, and teach your kids about smart mobile usage.
35. Check your child’s cell phone records. “Review cell phone records for any unknown numbers and late night phone calls and texts.” While it may feel as though you’re snooping on your kids, reviewing their calling and texting records can help you identify warning signs such as strange calling patterns or unfamiliar numbers that could indicate that your child is communicating with someone they shouldn’t be such as a potential predator. – Help children use cell phones safely, NetSmartz Workshop; Twitter: @NetSmartz
12. Contact your bank about a stolen phone. “Let your bank know if your phone or tablet is lost or stolen: If you use your mobile device for banking, it’s a good idea to alert your bank if your smartphone or tablet goes missing, even if you have a strong password and haven’t saved cookies from a previous session. That way, the bank can monitor your account for suspicious activities and set you up with new security measures right away.” – Stephen Ebbett, 6 Tips for Avoiding Identity Theft When Mobile Banking, About Money; Twitter: @AboutMoney
Just take a moment and think about how much you’re using your phone every single day. Answering calls, discussing plans, talking about your day with friends, playing games, watching videos and using apps, only scratch the surface of how much you’re actually using your phone. You might even have it by your bedside or on your nightstand when you go to bed at night. It’s time you stopped exposing yourself to dangerous EMF radiation and protected yourself from the dire consequences of using an unshielded smartphone or tablet.

The present study tested the effects of Wi-Fi (2.45 GHz for 1h) exposure on Ca(2+) influx, oxidative stress and apoptosis through TRPV1 channel in the murine dorsal root ganglion (DRG) and hippocampus of pentylentetrazol (PTZ)-induced epileptic rats. The cytosolic free Ca(2+), reactive oxygen species production, apoptosis, mitochondrial membrane depolarization, caspase-3 and -9 values in hippocampus were higher in the PTZ group than in the control although cell viability values decreased. The Wi-Fi exposure induced additional effects on the cytosolic Ca(2+) increase. However, pretreatment of the neurons with CPZ, results in a protection against epilepsy-induced Ca(2+) influx, apoptosis and oxidative damages. In conclusion, epilepsy and Wi-Fi in our experimental model is involved in Ca(2+) influx and oxidative stress-induced hippocampal and DRG death through activation of TRPV1 channels, and negative modulation of this channel activity by CPZ pretreatment may account for the neuroprotective activity against oxidative stress.
If you’re thinking of buying a phone case with ‘radiation blocking material’ believing it will reduce radiation, you should know this: Phones have automatic power control, such cases act as shields  and make the phone work harder, transmitting more power, increasing heat and reducing battery life, The incoming signal to the phone will also be reduced so your phone may not work in areas of poor signal.
George Carlo seemed like a good bet to fulfill Wheeler’s mission. He was an epidemiologist who also had a law degree, and he’d conducted studies for other controversial industries. After a study funded by Dow Corning, Carlo had declared that breast implants posed only minimal health risks. With chemical-industry funding, he had concluded that low levels of dioxin, the chemical behind the Agent Orange scandal, were not dangerous. In 1995, Carlo began directing the industry-financed Wireless Technology Research project (WTR), whose eventual budget of $28.5 million made it the best-funded investigation of cell-phone safety to date.4

Over time, the number of cell phone calls per day, the length of each call, and the amount of time people use cell phones have increased. Because of changes in cell phone technology and increases in the number of base stations for transmitting wireless signals, the exposure from cell phone use—power output—has changed, mostly lowered, in many regions of the United States (1).


This is a powerful tool when troubleshooting an Android as it allows you to rule out poorly written, malfunctioning, or troublesome applications as possible causes. If you have a bad app or have installed a bad update for an app and your phone stops responding properly or starts having issues then you could put your phone into Safe Mode, uninstall that bad app, take your phone out of Safe Mode and be good to go, which actually brings us to our next objective, how to turn on Safe Mode and how to take your cell phone out of Safe Mode.
Want an official word on the matter? The World Health Organization, which tends to err on the side of caution before outright dismissing something as toxic, carcinogenic, or otherwise harmful, is very clear that there is no health risk from radio-frequency communication devices. (Their briefing on the matter is actually a great read that highlights how low the risk is and how even people in Wi-Fi dense locations like schools and hospitals are exposed to radio-frequency radiation at thousands of times lower than international safety standards designed to protect individuals working in related industries).
Here at CellularOutfitter, we know it’s a challenge to find your perfect match, so we’ve hand-picked some of our best-selling cell phone wallets! To start with, we wanted to introduce the Embossed Butterfly Wallet Case that’s been stealing our hearts! Available in about 7 different colors, this wallet phone case also comes with amazing features like it’s detachable matching case, extra card slots, and a wristlet! Why wait? Have all your cards in one place and grab this wallet case so you’ll always be ready on the go.
And, it’s not just sperm. The results of an animal study suggest that some wireless frequencies may prevent egg implantation. During the study, mice exposed 2 hours a day for 45 days had significantly increased oxidative stress levels. The cellular damage and impact on DNA structure from exposure suggest a strong possibility of abnormal pregnancy or failure of the egg to implant. [12]
Cell phones emit radiofrequency (RF) radiation, and RF radiation has been shown to damage DNA and cause cancer in laboratory animals. A peer-reviewed Jan. 2012 study in the Journal of Neuro-Oncology concluded that RF radiation "may damage DNA and change gene expression in brain cells" in mice. [61] An Aug. 2009 meta-study found that RF radiation "can alter the genetic material of exposed cells." [62] A 2004 European Union-funded study also found that cell phone radiation can damage genes. [63] On May 26, 2016, the US National Toxicology Program (NTP) released the first results of its study on cell phone radiation, finding an increased incidence of malignant tumors of the brain (gliomas) and heart tumors (schwannomas) in rats exposed to RF radiation. [85] The NTP researchers also found DNA damage in the rats exposed to the highest levels of RF radiation. [86] On Nov. 1, 2018, the NTP released its final peer-reviewed report, concluding that there is "clear evidence of carcinogenic activity” in male rats exposed to RF radiation. [87]
Although mainstream outlets may ignore the proven dangers, especially in the US and Canada, researchers have identified several methods that can offer a level of defense. First off, reduced melatonin seems to correspond with exposure. Thus, increasing melatonin through supplementation may help offset some of the effects. [16] [17] [18] In animal tests, L-Carnitine provides antioxidant support for nutrients negatively affected by 2.4 GHz radiation. [19] [20]
In 2011, the International Agency for Research on Cancer (IARC), a component of the World Health Organization, appointed an expert Working Group to review all available evidence on the use of cell phones. The Working Group classified cell phone use as “possibly carcinogenic to humans,” based on limited evidence from human studies, limited evidence from studies of radiofrequency radiation and cancer in rodents, and inconsistent evidence from mechanistic studies (4).
The scientific journal umwelt · medizin · gesellschaft  addresses environmental medicine topics on a scientific basis--and their interdependence with today's society. The specialist journal reports on the latest medical findings and examines ecologically explosive, socially relevant topics. The UMG magazine is the official association organ of the environmental and medical associations dbu, DEGUZ, DGUHT, EUROPAEM, IGUMED, KMT and ÖÄB.
According to American Academy of Pediatrics President Dr. Robert Block, when cell phones are used by children, "the average RF energy deposition is two times higher in the brain and 10 times higher in the bone marrow of the skull," than for adults. [68] A July 2008 peer-reviewed study shows that children under the age of eight absorb twice the amount of radiation into their brain tissue as adults due to their lower skull thickness. [17]
50. Model the behavior you want to see from your child. “Model the manners and behavior you want to see. Avoid texting in the car. Consider narrating your phone use (“I’m looking up directions to the party”) so young kids understand the utility of the device. Make sure to excuse yourself if you have to interrupt a family moment to attend to your phone.” – My Kid Texts Constantly! What Can I Do?, Common Sense Media; Twitter: @CommonSense
When the Interphone conclusions were released in 2010, industry spokespeople blunted their impact by deploying what experts on lying call “creative truth-telling.” “Interphone’s conclusion of no overall increased risk of brain cancer is consistent with conclusions reached in an already large body of scientific research on this subject,” John Walls, the vice president for public affairs at the CTIA, told reporters. The wiggle word here is “overall”: Since some of the Interphone studies did not find increased brain-cancer rates, stipulating “overall” allowed Walls to ignore those that did. The misleading spin confused enough news organizations that their coverage of the Interphone study was essentially reassuring to the industry’s customers. The Wall Street Journal announced “Cell Phone Study Sends Fuzzy Signal on Cancer Risk,” while the BBC’s headline declared: “No Proof of Mobile Cancer Risk.”37
The NTP studied radiofrequency radiation (2G and 3G frequencies) in rats and mice (33, 34). This large project was conducted in highly specialized labs that specified and controlled sources of radiation and measured their effects. The rodents experienced whole-body exposures of 3, 6, or 9 watts per kilogram of body weight for 5 or 7 days per week for 18 hours per day in cycles of 10 minutes on, 10 minutes off. A research overview of the rodent studies, with links to the peer-review summary, is available on NTP website. The primary outcomes observed were a small number of cancers of Schwann cells in the heart and non-cancerous changes (hyperplasia) in the same tissues for male rats, but not female rats, nor in mice overall.
To be sure, the industry could not have been pleased with some of the Interphone study’s conclusions. The study found that the heaviest cell-phone users were 80 percent more likely to develop glioma. (The initial finding of 40 percent was increased to 80 to correct for selection bias.) The Interphone study also concluded that individuals who had owned a cell phone for 10 years or longer saw their risk of glioma increase by nearly 120 percent. However, the study did not find any increased risk for individuals who used their cell phones less frequently; nor was there evidence of any connection with meningioma.36
25. Use your cell phone for emergencies or important calls only. “Turn your cell phone off more often. Reserve it for emergencies or important matters. As long as your cell phone is on, it emits radiation intermittently, even when you are not actually making a call. If you’re pregnant, avoiding or reducing your cell phone use may be especially important.” – Dr. Mercola, NEW Urgent Warning to All Cell Phone Users, Mercola.com; Twitter: @mercola
×