The jury is still out it seems on the affects of using a cell phone and / or any links that this may have with brain tumors or other ailments. If you are concerned then you may wish to consult this handy reference guide to cell phones and the amounts of radiation that they emit. CNET has compiled a list of phones by 10 Highest US Models, 10 Lowest US Models, and a run down by manufacturer. Fear not, if you are looking for the iPhone on the list it's grouped under Other Manufacturers. Oh, and CNET has the following to say about how you should interpret their publishing of the lists: " It's important to note that in publishing this list are we in no way implying that cell phone use is or isn't harmful to your health. While research abounds and some tests have shown that cell phone radiofrequency (RF) could accelerate cancer in laboratory animals, the studies have not been replicated. Cell phones can affect internal pacemakers, but there is not conclusive or demonstrated evidence that they cause adverse health affects in humans. Conversely, there is not conclusive or demonstrated evidence that they don't cause adverse health affects in humans. So, in short, the jury is still out, research is ongoing, and we will continue to monitor its results."