There are still other things which I find concerning. For example " electromagnetic radiation emitted by mobile phones alters the permeability of the blood-bra

There are still other things which I find concerning. For example " electromagnetic radiation emitted by mobile phones alters the permeability of the blood-brain barrier (BBB), resulting in albumin extravasation immediately and 14 days after 2h of exposure." http://www.ncbi.nlm.nih.gov/pubmed/19345073 http://www.ncbi.nlm.nih.gov/pubmed/19345073 So I don't think there will be a definitive answer on the safety of these devices for a while.