Nope, have to disagree. I work in a university and see first hand the dependency that youngsters have on their phones. The ability to think and retain information has lessened due to over-reliance on phones for everything. Even had a student say to me "why do I need to know how long to boil an egg for when I can just google it" her words....
ok not everyone eats eggs (long story but was a conversation I had with her and 2 friends) but the fact a simple task that you'd remember as a basic life skill, was relegated to "I'll just use google" God help them if they have no phone nor internet, they'd starve
Mobile phones have helped us yes, but they also are a hinderance for social development in todays youth.
Parenting has a large say yes, but these kids are "grown up" and so reliant on their phones for social interaction that it's out of parents hands.
I don't think it's a problem with mobiles phones, its today's culture, especially in the western world.
"We don't care how you get the answer but we want the answer NOW and we wanted it YESTERDAY!"
That's the reason why there is no effort or reason to retain information anymore. Everyone wants everything now, not tomorrow so a quick Google search and job done.
When I was at school, we didn't have calculators for maths exams now they allow them. So you can get the right answer ASAP.