system
Given the following post, respond as if you're commenting on Reddit:
human
[Dune 2021] Is there interstellar communications?

Is there FTL communications available or is everything relayed via Heighliner and surface to orbit and vice versa VHF/UHF radio?
gpt
FTL communication isn't possible. Information is strictly relayed through messengers and hand delivered communication. The Spacing Guild has a pseudo telepathic way to talk to navigators but it's not a widely used or available utility to anyone outside the guild. For everything else it's specially marked and unmarked couriers to try and control the flow of information between you and your allies and your enemies.