Cell phones travel through microwaves. These are the same waves that are used to microwave your food. When you hold a cell phone to your ear, you are literally microwaving your brain.... you are heating it up while you are using it. Your brain does not have any nerve endings to let you know that it is getting hot. And.... the bluetooth is a receiver too... so that will not help if it is plugged into your ear. Also, having your cell phone on and in a pocket is bad too. As long as the cell phone is receiving signals, it is expelling the microwaves. do not sleep with a cell phone near your bed. Keep your phone at a distance from you as often as you can. Use your speakerphone as often as you can. Do not use your cell phone for long conversations.... only a phone with a corded earpiece. Also, wireless house phones work on the same principle, so beware. It will not show up until years from now, but my guess is that there will be an increase in cancers in the brain, and where people carry them around... like a pants pocket for men. No one wants to believe this info, because most people are so tied to their phones... they can't live without having it in their hand at all times. So sad that people cannot enjoy a lifestyle without instant connections. Most of the time when I see groups of people together, they are all texting others... what then, is the point of being together if you are not going to give full attention to the people you are with?