Besides the social risks of incivility and impoliteness (I-incivility), cell-phone use is classically associated with two types of physical risk: microwave radiation (LIMRadiation) and decreased attention while driving (CPUWDriving). As the literature has showed that adolescents' risky behavior was consistent with their risk perception, we ran a self-report survey to evaluate (1) how French adolescents (n = 1129) perceived physical risks related to CPUWDriving, exposure to LIMRadiation, and social risks related to I-incivility; and (2) the factors underlying these risk perceptions. Results showed that adolescents have an acute perception of the risks associated with CPUWDriving and appeared to be concerned, as a whole, with social risks related to I-Incivility. They do not appear particularly concerned by the risks related to LIMRadiation, which may reflect societal confusion about risks still considered as hypothetical and/or based on equivocal evidence. Gender, ethnicity, and age were not predictive for perceived risks. Level of schooling had a positive influence on perceived risks related to CPUWDriving and I-Incivility, and cell-phone ownership had an inverse relationship with perceived risks related to I-Incivility.