Now take my hot beverage example and repeat it a bunch of times. I would bet that cancer incidence would increase in the scalding group. (as you're destroying epithelial cells and forcing them to regenerate... and cancer is really biological lotto).
To top all the above off. With the exception of the migration from GSM to WCDMA technology (GSM pulsed the radio), cell phone radio output power has actually been on the decline due to smaller cells sizes being used in cities. It's nothing like using an analog cellphone in the 80's was in terms of output.