India, Feb. 5 -- Restricting phone use at school does not improve grades or mental well-being in young people, a landmark study has found.

The University of Birmingham study found students' sleep, exercise, academic record, and exercise did not differ between schools with and without phone bans in place.

Evidence also showed restrictive phone policies did not lower the overall time young people spent on their phones throughout the day.

The findings, which have since been peer-reviewed and published, compared 1,227 students and 30 different secondary schools. "There is no evidence to support that restrictive school phone policies, in their current forms, have a beneficial effect on adolescents' mental health and wellbeing or related out...