Smartphone use is ubiquitous in the lives of parents, and an emerging area of research is investigating how parental smartphone use during parent-child interactions affects children's language outcomes. Findings point toward negative outcomes in language development, but it is less clear what processes affect language outcomes. Gaze following, parental responsiveness, and joint attention are also reduced when parents use their smartphone, and all are critical to language development. In this article, we propose that these factors may mediate the effects of technoference due to parents' smartphone use on language development in children from birth to 5 years. Because of methodological differences in the limited research conducted on this topic, it is difficult to draw firm conclusions about this proposal. We discuss these considerations and suggest directions for the field.