Numerous peer-reviewed studies have shown an association between cell phone use and the development of brain tumors. According to a Mar. 2008 meta-analysis of cell phone studies there is a "consistent pattern" connecting cell phone use and an increased risk of developing glioma, a type of brain tumor.  A Mar. 31, 2009 study found that long term cell phone use (10 years +) "approximately doubles the risk" of being diagnosed with glioma on the same side of the head where the cell phone is held.  In Apr. 2013 another study of Swedish cell phone users also found an association between cell phone use and the development of glioma and acoustic neuroma - a benign tumor formation on the nerve near the ear.  That study’s conclusions were confirmed by a different study in Apr. 2014.  Other studies published from 2005-2013 have similarly concluded that there is an association between cell phone use and increased risk of developing brain and head tumors.    
This study elucidates the effect of short (15 days) and long-term (30 and 60 days) low level 2.45 GHz MW radiation induced local stress on the hippocampal spatial memory formation pathway in adult male mice. Researchers observed that 2.45 GHz MW irradiated mice showed slow learning and significantly increased number of working and reference memory errors in RAM task. Further, 2.45 GHz MW radiation exposure increases serum corticosterone level and the expression of CRH, CRH-R1 and i-NOS, while the expression of iGluRs, n-NOS, PSD-95, PKCε, PKA, ERK-p-ERK, CREB and p-CREB decreases in above mentioned hippocampal subregions in a duration dependent manner. “Our findings led us to conclude that 2.45 GHz MW radiation exposure induced local stress suppresses signaling mechanism(s) of hippocampal memory formation.”
The present study aimed to investigate the effects of chronic low-intensity microwave exposure (900, 1800 or 2450 MHz for 180 days) on cognitive function, heat shock protein 70 (HSP70), and DNA damage in the rat brain. The results showed declined cognitive function, elevated HSP70 level, and DNA damage in the brain of microwave-exposed animals. The results indicated that, chronic low-intensity microwave exposure in the frequency range of 900 to 2450 MHz may cause hazardous effects on the brain.
i say to be as proactive as possible, limited wifi use and all of the above, but we can’t live in bubbles and if all this powerful God given food, supplements, exercise and sunshine is so good for us… then focus on that more than anything. stress of all the unknowns will kill us faster if we obsess about it. live like God wants you to, laugh a lot and stop worrying.
The aim of this study was to investigate the effects of electromagnetic radiation (EMR) on the pancreas tissue of young rats and the ameliorative effect of Gallic acid (GA). Six-week-old, 48 male rats were equally divided into four groups: Sham group, EMR group (2.45 GHz), EMR (2.45 GHz)+GA group (30 mg/kg/daily) orally and GA group (30 mg/kg/daily). After 30 days, serum and pancreatic tissue samples were harvested for biochemical, histopathological and immunohistochemical analysis. Serum amylase, lipase, glucose, and tissue malondialdehyde, total oxidant status and oxidative stress index were increased, whereas total antioxidant status decreased in the EMR group. The histopathological examination of the pancreases indicated slight degenerative changes in some pancreatic endocrine and exocrine cells and slight inflammatory cell infiltrations in the EMR group. At the immunohistochemical examination, marked increase was observed in calcitonin gene related protein and Prostaglandin E2 expressions in pancreatic cells in this group. There were no changes in interleukin-6 expirations. GA ameliorated biochemical and pathological findings in the EMR+GA group. These findings clearly demonstrate that EMR can cause degenerative changes in both endocrine and exocrine pancreas cells in rats during the developmental period and GA has an ameliorative effect.
To shed a bit more light on it – powerline electromagnetic fields have different (though not necessarily better) biological effects. 50/60Hz powerline fields alter ion transport across intra- and inter-cellular membranes, accelerating or inhibiting chemical reactions, depending on the reaction. Also within the reception range of bulk brainwave action. So not the greatest thing for physical and mental health. As you go higher in freq range, the effects become more just thermal and neurostimulative at high enough field strength. From 400MHz on up the issue becomes field-excitation of mechanical shaking of DNA strands resulting in sequence breakage and translocations – not great for cancer risk… for those really bored and curious, read the studies bibliography of IEEE C95.1-2005. I found C95 and its underlying studies to be the most helpful body of work when setting the safety standards for inductive wireless charging.
Do cell phones cause cancer? The preliminary results of a massive, government-funded study suggest they could. This makes cell phone safety an incredibly important topic. The early findings in the $25 million U.S. National Toxicology Program animal study show exposure to very high signal cell phone radiation led to a slightly increased risk of malignant gliomas in the brain and schwannomas of the heart in male rats. Schwannomas are tumors that form in the nerve sheath. (1)
“It’s because WiFi is just a low frequency sound wave.” For me, the jury is still out concerning the link between WiFi and sleep disturbance. But I’m sorry, you are wrong about WiFi being a low frequency sound wave. It is a radio wave, i.e. electromagnetic, and it runs at 2.3 GHz and/or 5 GHz, which cannot by any stretch of the imagination be described as low frequency.
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Another animal study, in which rats were exposed 7 days per week for 19 hours per day to radiofrequency radiation at 0.001, 0.03, and 0.1 watts per kilogram of body weight was reported by investigators at the Italian Ramazzini Institute (35). Among the rats with the highest exposure levels, the researchers noted an increase in heart schwannomas in male rats and non-malignant Schwann cell growth in the heart in male and female rats. However, key details necessary for interpretation of the results were missing: exposure methods, other standard operating procedures, and nutritional/feeding aspects. The gaps in the report from the study raise questions that have not been resolved.
RESULTS: The results revealed that long-term exposure of 2.4 GHz Wi-Fi radiation can alter expression of some of the miRNAs such as miR-106b-5p (adj p* = 0.010) and miR-107 (adj p* = 0.005). We observed that mir 107 expression is 3.3 times and miR- 106b-5p expression is 3.65 times lower in the exposure group than in the control group. However, miR-9-5p, miR-29a-3p and miR-125a-3p levels in brain were not altered.
The FCC’s safety standards for cell phone radiation were based on studies conducted in the 1980s, These studies have long since been rendered obsolete by newer research. Yet for years the FCC refused to update or even review its standards. Instead, the federal agency simply sat on its hands while cell phones became ever more powerful and ubiquitous.
I have treated patients with cancer for over thirty years as a board-certified radiation oncologist and I am familiar with every carcinogenic agent known to man. I'll tell you with absolute certainty that radio waves cannot harm you (unless perhaps you were in the path of a multi-megawatt microwave beam, in which case they might cook you. But as far as I know, there is no likelihood that this danger even exists).
Lloyd’s precautions are good ones, although he doesn’t cover cell phone use. I’ve worked on cellular telephony for the last 18 years, coming to the same conclusions about cell phones about ten years ago, the science had gotten conclusive enough for me, as I doubted at first that they could be a problem. As you may have heard, you don’t want to talk on them next to your head if you can help it, use speakerphone mode or wired or Bluetooth headset (BT is very low power, usually keeping itself around only a milliwatt, although wired or speakerphone is better). Don’t park it all day long on any body parts you want to keep cancer-free, especially the pelvic and pectoral regions (trying to keep it classy here). I wouldn’t advise living within a third of a mile of a cell phone tower, or within a mile of a TV tower, if you can help it. Best wishes all.
The device comes in a variety of forms ranging from the $39 Aries Shield ("a silicon based micro processor that ... decomposes oscillations of electromagnetic fields") to the $249 Aires Defender Utility (which "has two next generation 9 core silicon based micro processor (sic) that provide universal protection from electromagnetic smog of the broadband frequencies").
4. Erase your data with a swipe. “Apps like Find My iPhone and Lost will…allow you to remotely wipe the phone, erasing your personal data and restoring it to its original settings should it become stolen. This will help keep your passwords, logins, and online accounts safe.” – Amanda Perez, Cell Phone Safety Tips For Stolen Devices, ABC30; Twitter: @ABC30