There are a few ways to name a group chat on Android and iPhone, but the most popular way is to use the app’s built-in messaging system. To create a new chat, open the messaging app and type in “chat” followed by the name of the group you want to join. For example, if you want to join a chat about fitness, type “fit_chat” into the messaging app and hit enter. If you’re using an iPhone, type “chats” into the messaging app and hit enter.