Of all the critiques I've read, this one is most arrogant. "We found this great way to cause cancer. Cell phones can't do it this way, so they must not cause cancer." Cancer may be caused, or abetted, by yet undiscovered mechanisms, and it's hubris to presume we know enough about cancer, or the human body, to say these mechanisms can't exist. Cell phones might inhibit DNA repair mechanisms, for example.