Earlier quoted context omitted.
It is far more likely that it is due to numerous other causes, some even with proven links – there is, however, still no links to mobile phone use, and no known mechanism by which it could even happen. Non-Ionizing Radiation causing cancer is probably as close to a physical impossibility as you get. Besides, there are numerous of other sources of radiation that is much stronger, including visible lights. You should b…
Proving a link between cancer and one specific environmental factor is the physical impossibility you're looking for. Epidemiological studies tracking humans over time aren't controlled and will at best show a correlation worth studying, lab animal studies aren't great analogs given all the confounding factors and environmental differences with humans in real life, and unless the cancer causing agent acts quickly a c…
But.. that happens all the time? The link between excessive solar exposure ("tanning") and cancer is extremely well documented.