RF Energy from Cell Phones
The State of California just came out with a good piece (a downloadable PDF) on recommendations for lessening the amount of electromagnetic energy that impacts you or your children's bodies. It is a serious issue they deal with, and I would advise to heed their advice as much as possible. You can find it here. Distance / proximity to your body is the primary way of literally distancing yourself from the radiation. The field drops off very quickly, so it's not like you need to keep the phone far away, just follow their guidelines as best you can. I use earbuds as much as possible, or use the on-speaker option. Cheers!