That's technically not correct, since RF-induced tissue heating can absolutely cause all sorts of cell damage. As far as I know there have been some indicators

That's technically not correct, since RF-induced tissue heating can absolutely cause all sorts of cell damage. As far as I know there have been some indicators that cancer can be caused by RF tissue heating. However, the field strength generated by everyday devices are regulated to levels that are thought not to generate a relevant heating effect in typical use. Additionally, looking at your phone means it is an appreciable distance away from the brain, unlike using a phone as a phone.