The damage that is done to the brain of children by smartphones/mobile phones is much worse than described here.
Much, much worse…
Study of 13,000 children exposes link between use of handsets and later behavioural problems
Scientists found that mothers who did use the handsets were 54 per cent more likely to have children with behavioural problems and that the likelihood increased with the amount of potential exposure to the radiation
Women who use mobile phones when pregnant are more likely to give birth to children with behavioural problems, according to authoritative research.
A giant study, which surveyed more than 13,000 children, found that using the handsets just two or three times a day was enough to raise the risk of their babies developing hyperactivity and difficulties with conduct, emotions and relationships by the time they reached school age. And it adds that the likelihood is even greater if the children themselves used the phones before the age of seven.