The first is CAT, or Cancer Assisted Tomography. They can shoot high energy cancer rays (a particular type of radiation) through your skull and measure what comes out the other side. Tumors sometimes absorb more cancer rays (also called x-rays) than other tissue, basically creating a shadow they can see. This doesn't work all that great, also the cancer rays are also millions of times more likely to cause cancer than your iphone.
The other type of scan is nuclear magnetic resonance imaging or NMRI. In NMRI, they stick your head into a big magnet. Then they take a big cell phone transmitter, point it at your brain and turn it on (i.e., sending radiation into your brain). This (combined with the magnet) basically turns your brain into a nuclear powered cell phone transmitter. Then an RF coil inside the Nuclear MRI machine picks up the calls your brain makes, and they get a picture out.
Did I use the words nuclear and radiation frequently enough to make you afraid?
But most people who are placed in controlled and blinded experiments to see if they can detect EMF find that they cannot. There is no good evidence that EMF hypersensitivity is anything more than stress, and seeing a psychiatrist would be of more help to you in this scenario.
Alternatively, I hear homeopathic practitioners are still getting state funding in the UK. Why not use a fake medicine to cure a subjective problem? At least you can be sure there will be no medicinal side effects! ;)
Was your previous phone GSM-based? That buzz is not specific to iPhones. All GSM phones have it (to a certain degree). Search for 'gsm buzz'.
You can find the radiation level of your phone at the link below. Enter the FCC ID that is located on your phone. The lower SAR, the better. Anything over 1.0 is relatively high and 1.6 is the maximum legal limit. I think the iPhone is around 1.0-1.1.
https://fjallfoss.fcc.gov/oetcf/eas/reports/GenericSearch.cf...