All cellular devices are given a SAR (Specific Absorption Rate) rating, that measures how much RF energy is absorbed by a user’s head and body. This is measured in watts per kilogram, and is the maximum absorption the phone is capable of. With the hundred of different phone models, with new ones coming out all the time, it’s hard to say what phone has the highest SAR rating. Generally, iPhones have skewed higher on SAR ratings when compared with other phones. Samsung phones have a reputation for scoring low SAR ratings. We recommend checking your devices specific SAR rating, which can be checked in the phone’s user manual as well as on the manufacturer’s website and the FCC website.