“Comparative Cyto- and Genotoxicity of 900 MHz and 1800 MHz EMF Radiations in Root Meristems Allium cepa,” Exotoxicology and Environmental Safety, January 2020.
Very low SARs lead to DNA breaks: 0.09 W/Kg @900 MHz and 0.169 W/Kg @1.8 GHz. Damage “more pronounced” at 1800 MHz. (Allium cepa = onion)