Devra Davis, an epedemiological cancer researcher[1], writes how it often takes decades for the same carcinogens to actually cause tumor growth in humans while it can take just years (or even much shorter) in mice.

I dont know exacty when cell phone usage became widespread in the developed world, but if it was the 90s to mid 2000s we may still need another decade to start seeing the possible effects.

https://www.amazon.com/Secret-History-War-Cancer/dp/04650156...