The presence of mobile phones in schools has become one of the most contested issues in contemporary education, dividing teachers, parents, and students along lines that reflect deeper disagreements about trust, technology, and the purpose of school itself. I agree that mobile phones should be banned during the school day, and the evidence increasingly supports this position. The most persuasive case for a ban is the impact of phones on academic focus. Research conducted following school phone bans in several countries, including France and the United Kingdom, has consistently found that students — particularly lower-achieving students — perform better academically after phones are removed from the school environment. The reason is intuitive: the pull of social media notifications, messaging threads, and video content is powerful enough to fragment attention even when phones are nominally put away, as the anticipation of checking them distracts from the task at hand. Without the device present, students engage more deeply with lessons and retain more of what they encounter. Beyond academic performance, school phone bans address a second significant problem: the social dynamics of the playground. Cyberbullying incidents, social exclusion reinforced through group messaging, and the social anxiety generated by constant comparison of followers, likes, and online status are all amplified by phone access throughout the school day. Schools that have removed phones during breaks report improved face-to-face social interaction and a reduction in the type of social conflict that phone-mediated communication tends to escalate. Critics argue that banning phones fails to teach the digital literacy and self-regulation that students will need as adults. This is a fair concern, but it conflates two distinct goals: schools can absolutely teach responsible technology use through structured, supervised lessons while still maintaining a phone-free environment outside those contexts. Learning to concentrate without a device is itself a skill that the ban actively develops. A ban during school hours and education in digital responsibility are complementary policies, not contradictory ones.