[ev1]

Someone still needs to pay for the data transfer costs ala ngrok.

I don't know of a single US mobile network that provides publicly addressable IP space, v4 or v6, it's all behind more than one layer of NAT.

AT&T doesn't even allow direct internet access, every single connection goes through their horrendously bad transparent proxy that breaks TLS 1.3, breaks ESNI, causes a SSL_RX_RECORD_TOO_LONG connection reset if you negotiate only modern ciphers, and sits in the middle of every connection to prevent things like obfsproxy.