According to wikipedia:
From the trailers it looks like wireless network that connects all the citizens is via contact lens that has a little wire that goes into the eye! They're still popping their soma tablets.
The series "imagines a utopian society that has achieved peace and stability through the prohibition of monogamy, privacy, money, family and history itself."[3] In an update of the original novel, an artificial intelligence system named Indra also connects citizens via a wireless network.[4] (The name references Indra of Hindu mythology.)
From the trailers it looks like wireless network that connects all the citizens is via contact lens that has a little wire that goes into the eye! They're still popping their soma tablets.