In terms of health issues is due to the behaviour of a cell phone attached to your head and ears, touch, hear and talk through the microphone inside the hollow.
In terms of health problems, not less. The usage of mobile contactless attach the head and ears. To hear Speaking through a microphone and internal tools.
In terms of health problems is not. Due to the use of a mobile phone to contact attach the head and ears. To hear sound and speak through a microphone inside the machine.