A commonly cited study found the devices to be possibly carcinogenic, or cancer-causing, but the report did not have enough evidence to solidify the claim. “Patients who develop a brain cancer obviously want to know why and how,” However, the FCC points out that lower SAR values do not necessarily make one device safer than another. The highest allowable for mobile handsets in the United States is 1.6 w/kw. You can check the number on your phone or look it up for Apple and Android devices. Recommendations include.