Lots of people using speakerphones and ear-buds now -- but they have no idea how they were conditioned to.
Read Cell Phones: Invisible Hazards in the Wireless Age for some of the dirt on the Cell Phone Industry.
https://www.amazon.com/Cell-Phones-Invisible-Wireless-Discoveries/dp/078670960X
and/or Zapped by Devra Davis.
Worth a read!
www.MicrowaveNews.com is also an interesting source of information.
The RF color charts I linked in my post give a quick overview and attest to the fact that "wireless safety" is largely a canard.