CB radio. They cannot jam it like HAM because truckers use it. Other than that, wifi mesh networks. They can jam those but not really selectively so it would take down internet in homes if they tried. Think mesh network wifi at first, CB radio for later. If they shut that down, just talk on the police bands and be mobile when you do. Should things ever be that bad, there might not be any police reporting.

Make no mistake though, they are coming for speech because the rest is a cake walk once they have that. They have unlimited funds and beyond consumer tech. It would be a miracle if the people wanting to be free survive what is coming.