[toss1]

>>Buying phones on craigslist is one example.

It seems that this would work for a while, but if we're trying to bootstrap well into the future, a shiny new phone of the hour Samsung S22 showing up new on the network only 15 years out in 2037 would stick out like a beacon, and that's assuming it would even connect to the then-current comms protocols.

This is nontrivial