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I've built this years ago: https://play.google.com/store/apps/details?id=com.pseudozach.lightspot as a proof of concept.
It allows you to sell your phone data connection, it can easily be adapted to public wifi instances or even a dedicated 5G terminal that has an onboarding via LN.
ps: mining part makes no sense
Any update on this project?
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Nice! Is there anyone using that? Do you have some plans with it?