Meanwhile, here in South Africa, our intrepid criminals are making their own simcards, by the bucketload..

https://www.citizen.co.za/sandton-chronicle/news-headlines/l...

For fun - Put that phrase in Google. "No chill in Mzanzi"

When thinking about offline currency and simcards we identified the following:

verifiable centrally issued identifier printed on card and can be verified by inserting into any phone

coin-like small physical tokens

offline verification processes could be as simple as a distributed poster with whitelisted id's

distributed and decentralized bootstrapping based on trust in accepted id's.

The AI generated graphics really cheapen your effort.