The first study was conducted by researchers at Sweden’s Sahlgren Academy, who found that adolescents who made more than 15 phone calls and sent more than 15 text messages in a day not only slept poorly, but when compared to kids who made did the same less than five times a day, they were also leading more careless lifestyles, including spending more time on their computers, drinking more alcohol and caffeinated drinks.
The second study was conducted in the US by Fred Danner at the University of Kentucky. He found that teens who were addicted to their phones slept less than eight hours a night, and as a result got poorer marks at school.
Why mobile phone addiction is bad for kids- Healthcare-Healthcare / Biotech-News By Industry-News-The Economic Times
So, do kids who lack self-control use their time less wisely, or does mobile phone use cause lack of self-control? I know where my bet is.