What is the manufacturer's recommended minimum
"Exposure to Radio-Frequency Energy On iPhone go to Settings > General > About > Legal > RF Exposure. Or go to www.apple.com/legal/rfexposure."
According to test reports filed with the U.S. Federal Communications Commission (FCC), the Specific Absorption Rate (SAR) for the iPhone SE for cellular transmission is 1.14 watts per kilogram (w/kg) at the head, and 1.14 w/kg when worn on the body. The wireless router SAR is also 1.14 w/kg. The SAR for simultaneous transmission (cellular plus Wi-Fi) is 1.59 w/kg at the head, 1.58 w/kg when worn on the body, and 1.56 w/kg when the phone is used as a hotspot.
The SARs for the iPhone 6 models can be found at http://bit.ly/iphone6radiation.
For tips on how to reduce your exposure to wireless radiation, see "Some Tips to ReduceYour Exposure to Wireless Radiation". (18) In short, limit your use of the phone, keep the phone away from your body whenever it is powered on, use the phone hands-free, and turn off transmitters not in use (e.g., shut off Wi-Fi or use airplane mode).
(7) Environmental Working Group. EWG’s Guide to Safer Cell Phone Use: Where is EWG's cell phone database? August 27 2013.
(18) Joel Moskowitz. Some Tips to Reduce Your Exposure to Wireless Radiation (one page handout). Undated. http://bit.ly/saferemrtips3