These are the beginning stages of an alternate unstoppable internet. The principle is simple, one device makes a connection with another device. The connection is free. There is no need for a middleman connecting a toll. A lot more people today understand why that will be absolutely necessary in the future.
The software is developing rapidly and will become more and more useful but if you have several devices available like old unused phones you can put them to use again.
These apps are known as ‘Off-the-grid’ chat messenger app that works even without internet connection or 2G, 3G, or 4G network coverage
https://www.geckoandfly.com/22562/chat-without-internet-connection-mesh-network/
Sounds good... I was musing why we can’t use the SETI Screensaver approach... maybe with a little Napster thrown in....let the actual devices on the network do all the processing and storage (blockchain?) so we can say FU to all the infrastructure guys like Amazon. Distributed is the way to go!