Supposedly they have done studies which all say they don’t cause brain tumors. I have never read the studies, so I have no idea how they conducted the studies, and exactly what they were measuring. I still think cell phones possibly do cause cancer. I once saw a show that had a woman that got a tumor in the area where her cell phone is always and she talked on the phone like 300 minutes daily. So that is much more than the normal person, and this is just one example. I guess it could be a coincidence?