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comment by am_Unition
am_Unition  ·  2847 days ago  ·  link  ·    ·  parent  ·  post: Trump’s F.C.C. Pick Quickly Targets Net Neutrality Rules

I think you could encode some ham radio frequencies, but passing the cypher between cities would require someone making the trek. Not sure that this would be sustainable, though.

Also, all smartphones have an FM chip, not really sure how hard you could drive it, I'd imagine it just acts like a receiver.