7. Keep it locked. “Make sure that you have a secret PIN (personal identification number), a password, fingerprint setting or other security measures in place so that only you can access your phone.” – National Cyber Security Alliance, June is Internet Safety Month! The National Cyber Security Alliance (NCSA) and ConnectSafely Share Tips to Ensure Online Safety and Summertime Fun, PR Newswire; Twitter: @PRNewswire
c) and before you raise the argument that visible light is itself electromagnetic radiation, with even shorter wavelengths than microwaves, electromagnetic radiation within the visible light range does not penetrate living cells and other molecular materials as X-Rays (ionising radiation) or microwaves (non-ioninsing radiation) do. Practically all visible light is reflected by our bodies, and therefore it’s energy is not absorbed by our cells and is therefore harmless.
If you’ve bought a computer any time in the last 5 years, there is almost a certainty that it has wifi built in. We’re far past the days of getting separate wifi cards or adapters for our computers. The problem is, Wifi does emit RF radiation, a type of EMF radiation that is very harmful. Whether you have a desktop computer or a laptop that you use, it likely uses Wifi, so let’s take care of that.
RF radiation, which includes both radio waves, and microwaves, is at the far end of the electromagnetic spectrum and is a low energy wave. This makes RF and microwave radiation a form of “non-ionizing radiation” which just means that there is enough energy to move the atoms in a molecule around and cause friction, but not enough energy to actually remove a charged particle (ionizing).
There has been no rise in the rate of brain cancers despite a massive increase in the use of cell phones. If cell phones were causing cancer we could expect a significant rise in the rate of brain and other related cancers. According to the National Cancer Institute, there was no increase in the incidence of brain or other nervous system cancers between the years 1987 and 2005 despite the fact that cell phone use dramatically increased during those same years.  Between 2004 and 2010 there was still no significant change in the incidence rate of brain tumors. Between 2004 and 2010 there was a slight increase from 209 cases to 221.8 cases per 100,000 people, but this slight increase was attributed to better tracking and recording of cases.  During the same time period, cell phone use increased 62.7% from 182,140,362 subscribers in 2004 to 296,285,629 in 2010. 
Thus far, the data from studies in children with cancer do not support this theory. The first published analysis came from a large case–control study called CEFALO, which was conducted in Denmark, Sweden, Norway, and Switzerland. The study included children who were diagnosed with brain tumors between 2004 and 2008, when their ages ranged from 7 to 19 years. Researchers did not find an association between cell phone use and brain tumor risk either by time since initiation of use, amount of use, or by the location of the tumor (21).
That comes at something of a price though, and the chunky bezels mean it’s not the most stylish phone — though we do like the bronze edges. Still, it’s powerful, outstripping most other phones under $300, which makes it the perfect companion for a gaming-happy generation. The camera suffers from poor performance in low light, but is otherwise good. It’s also running on Google’s Android One operating system, which means the phone will be updated with the latest security patches and new features quickly and often, helping to keep your kid’s phone secure. It’s a great choice if solid performance and durability are preferred to flashy looks.
gamma rays produce virtually no electricity in the human body because the actual inherent energy of gamma rays that actually hits molecules is next to 0. for gamma rays to produce any electricity they would need to hit something much more dense – like lead and for you to generate any significant electricity from gamma rays hitting the earth you would need a huge slab of it.
Radiofrequency radiation from cell phones is non-ionizing and is not powerful enough to cause cancer. Ionizing radiation, including x-rays and ultraviolet light, produces molecules called ions that have either too many or too few electrons. Ions are known to damage DNA and cause cancer. Cell phone radiation, like radio, TV, and visible light radiation, is non-ionizing and lacks sufficient energy to add or remove electrons from molecules, and therefore it cannot ionize and cause cancer.  According to the authors of a 2005 peer-reviewed study of 3.7 million Swedish residents, a "biologic mechanism that could explain any possible carcinogenic effect from radiofrequency radiation has not been identified." 
when i bring my hand very close to a tuned-in radio transistor, the volume drops to almost zero and i can no longer hear the music or news unless i take my hand away from the transistor radio set. if that is the effect of em radiations from a human body on the audible signal of an electronic device reducing its audio signal to almost zero then the long-term effect of powerful em radiation of 1- 2GH frequency from a wi-fi router or a celphone must be dramatically traumatic for the human health. this has to be so because human body almost entirely functions on signals generated by ions and molecules in the body cells which are likely to be severely disrupted in the presence of such strong em radiation fields emitted by man-made external sources such as wi-fi routers and mobile phones.
Studies by five independent research groups regarding cell phones and brain tumors have revealed significantly increased risks of a benign tumour of the cranial nerve supplying the ear. This grows slowly and must be removed in a major operation that can result in permanent facial paralysis. Other risks found were cancer of the glial cells (including neurons) of the nervous system and cancer of the meninges, the membrane covering the brain and spinal cord.