I Definitely support your claim.
I'm currently a serving corp member in a community school, despite the high level of lack of academic materials to teach the students some of them have access to smartphones but still their academic performance is only getting worse, which means majority of the students are not using their smartphones to assist themselves in improving their knowledge.
Especially for students in lower levels like secondary schools, they are incapable of controlling their lust for the things they see on the internet which will only make it a lot difficult to stay focus in schools.