Is using a mobile phone in the car or at home safer because these constitute a barrier to radiation?

Mobile phones and EMF FAQ

Is using a mobile phone in the car or at home safer because these constitute a barrier to radiation?

If the mobile network reception is lower inside a car or house, a mobile phone may increase the transmitter power to maintain a quality connection. Mobile phones continuously adjust the transmitter power depending on reception quality and are designed to operate at the lowest power possible.

Mobile phones are tested for compliance to the human exposure standards at their highest possible power level. Variations in transmitter power do not mean that there are variations in safety.

An external car antenna can be used to improve the mobile phone reception and reduce the exposure levels inside a vehicle.