A 2018 study linked behavioral problems in children with excessive use of smartphones, which was shown to cause issues including attention deficit disorder (ADD) and depression.
Utafiti uliofanyika mwaka 2018 uliohusisha  matatizo ya kitabia ya watoto na mazoea yaliyopitiliza ya matumizi ya simu janja , ulibaini kuwa, matumizi makubwa ya simu janja hupelekea matatizo kadha wa kadha yakiwemo Tatizo la Kukosa Umakini (ADD) na sonona.