It has long been established that one of the causes of stress is not knowing what will happen next i.e. not being in control of one’s situation and an example cited was that of the job of telephone answering.
The mobile phone, if left switched on, keeps the owner in a state of constant expectation – conscious or unconscious – which is stressful whether noticeable or not. Furthermore, having got so used to it being switched on, if it ever has to be turned off the owner is in a situation of deprived expectancy – also stressful whether noticeable or not. This is a lose lose situation.