With all the radiation "reports" going on, is it okay to use them? Or does this fall under watching one's safety?
Cell phone use is so widespread and the results of these studies are sketchy at best. Even if there is truth to the "reports", since the use of cell phones is so widespread it falls under the category of Shomer Pisayim Hashem, G-d guards fools. i.e. It is permissible to use cellphones.