So, how many users hold their iPhones to their head or carry it in the pants pockets nevertheless? The Vienna Doctor’s Chamber (Wiener Ärztekammer) has been warning for over 11 years from excessive mobile phone use especially by children.

from Apple.com: iPhone 7 RF Exposure information:

“To reduce exposure to RF energy, use a hands-free option, such as the built-in speakerphone, the supplied headphones, or other similar accessories. Carry iPhone at least 5mm away from your body to ensure exposure levels remain at or below the as-tested levels. Cases with metal parts may change the RF performance of the device, including its compliance with RF exposure guidelines, in a manner that has not been tested or certified.”