This study addresses normative orientations to smartphone use in Swedish upper-secondary classrooms. We present a Nexus Analysis from a policy enactment perspective of a material comprising ethnographic interviews, classroom video observations, and smartphone screen capture, investigating how a cultural conception of the smartphone as a source of disturbance is negotiated in discursive and embodied social action. Three groups of policy actors -- head teachers, teachers, and students -- balance competing agendas such as digitalization strategies, popular media narratives, and student autonomy and peer relationship maintenance. There is a tension between orientations to the smartphone as a legitimate resource for socialization and learning in the digitalized classroom, but also as an exception to desired digitalization -- a potential threat to the social and disciplinary order of the classroom. Notably, the students display considerable awareness of such tensions, in reflective comments made in interviews and in displayed strategies for managing their smartphones in class.