Bridgefy, Firechat, Bitchat and other bluetooth/wifi peer-to-peer SoMe's are great as long as you're enough people around. As long as you don't rely on one of the big tech app stores (or use an iPhone), it's not hard to get them even when the government is being tyrannical. It would be interesting to build something that would work over the various IoT networks which basically span all of Europe, but I guess that would be hard in countries where there are large areas of "nothing". It also depends on farmers choosing open source technology for their tech since you'd need a lot of farming IoT equipment to connect cross rural areas.
embedding-shape|15 days ago
A portable device that could effortless hook up to the existing decentralized wireless networks would be even better, Freifunk covers large part of Germany, Guifi covers large parts of Spain, probably there are more somewhere else too, but AFAIK there is no portable device that lets you easily just connect and chat, still requires a bit of setup to participate.