Genetics. If you live long enough and escape all the other killers, you will develop some form of cancer. That is a fact.
Radiation in mild doses may prevent some cancers, radiation is used as a treatment, because many cancer cells cannot tolerate it as well as normal cells.
Cell phones-you are exposed daily to far more electromagnetic energy than a cell phone could ever produce.
You are going to die, some will die sooner than others, but living to the ripe old age of ninety is not always a happy outcome. Enjoy.