When you have internet access, your Endless OS computer can function as a tool to talk to people in many ways. This functionality is available through apps, some of which may have been preinstalled (perhaps available through the Social folder on your desktop), or otherwise available for download from the App Center.
Social networks such as Facebook, Instagram and Twitter can be accessed via your web browser. The App Center may also include some apps tailored for access to your preferred social network.
Keep in mind that you will need speakers or headphones, a microphone, and a video camera in order to use your computer as a phone or for video chatting.