A review of studies by Physicians for Safe Technology
The Environmental Health Trust has a wealth of articles, videos, and links about cell phone use.
For those who want to dive in and learn more, see Dr Joel Moskowitz's website:
Read your cell phone manual
10 Tips to Reduce Cell Phone Radiation
PSA's and Videos, including for children and teens: https://ehtrust.org/resources-to-share/public-service-announcements-cell-phone-radiation/
Use a landline whenever possible,
there is no radiation. There are many models available now online and at reasonable prices. There are many styles and some have speakerphone options for hands free calling. Use a longer cord either from the wall to the phone or from the phone to the headset if needed or desired.
Cooper landlines are best because they remain functional in a power outage.
Cordless phones have a great deal of wireless radiation, even when not in use. An old fashioned, corded landline or with a speakerphone is safest.