This review article examines how different types of communication technologies, from the specialized medical to generic social devices, influence belonging and sociality among deaf and hard-of-hearing (DHH) people. The emphasis is on DHH adolescents and young adults who may be impacted differently across countries, given state-specific policies regarding the status of sign language and deaf education, and based on different availability, affordability, and accessibility of communication technologies. We introduce different perspectives on deafness, ranging from pathological to cultural, a heuristic on which we build to explore DHH socialities as complex and evolving. We then analytically review ethnographic research on how cochlear implants impact DHH people's belonging to the "deaf world" and/or the "hearing world," and how they navigate between these worlds. Then we move on to technologies such as text messages and social media, which enable DHH people to extend their socialities beyond local communities. Belonging is a fluid phenomenon, and technologies which are in a constant process of innovation and development may influence it in complex ways. We argue that to explore questions of belonging, identity, and sociality among DHH people, and