At the annual meeting of the American Academy of Pediatrics, which took place in San Diego just a few days ago, they heard several studies reporting on the damaging effect of cellphone radiation on parent-child relationships and on the acquisition of language for children. Parents who are preoccupied with their cellphones, with their babies, and with their infants are not talking to those babies. We know, those of us who have survived motherhood, talking to babies is how they learn to babble back at you. When you talk to your baby from the time you're pregnant, when they're born they know your voice. You need to keep talking to them.
I remember, when I was doing a post-doc, reading to my child because I wanted her to hear my voice. If a parent is completely obsessed with these devices the child's acquisition of language suffers.