This visual essay is based on from a two-year ethnographic project about smartphone repair practices in Switzerland, focusing on repair stores, hackerspaces, Fab labs, and temporary venues such as repair cafés, which mostly focus on the material elements of the hardware (broken screens or buttons) and software issues (data recovery, setting updates, applications installation, etc.). Our investigation addressed the practices of the technicians who founded, or operate, these places. Focusing on repair stores, this comic strip visually describes the importance of “unmaking” as a learning tactic that repairers adopted to generate knowledge about the objects they plan to fix.