Initially, many forms of long-range communication were limited, be they due to the threat of the Grimm, or that mankind has not accomplished space travel yet due to inefficient use of Dust not working outside of Remnant's atmosphere. Then, came the Cross Continental Transmit System, a technological marvel provided by the Kingdom of Atlas. These towers provide wireless signals to devices like Scrolls, but the signal becomes weaker the further away one is from a relay tower. Moreover, if one of the towers is taken offline, then so does its network along with the rest of the towers.