Mobile devices are increasingly upheld as powerful tools for learning and school reform. In this article, we prioritize youth voices to critically examine assumptions about student interest in mobile devices that often drive the incorporation of new technologies into schools. By demonstrating how the very meaning of mobile phones shift as they are institutionalized and by highlighting the divergences between adult and youth assumptions about these devices, we make a significant contribution to policy debates about the role of new digital technologies in the classroom. In addition, we explore challenges such as privacy, freedom, and resource-use that emerge when scaling-upthe use of mobile technologies in the classroom.