I use the underground frequently. It doesn't really feel like half of it is covered. Where it is available, it works amazingly. I might have been using the other half by sheer luck.
I find it works pretty well, at least that I’m consistently surprised I have any signal at all. Sometimes I need to disable private relay to get it to work with all the switchovers. There’s also frequent swapping between the 5G signal and the Wi-Fi that comes auto-enabled on my phone by my carrier who provides a client certificate entitling me to it.
I’m not sure about the privacy implications of this whole setup. It’s basically turned the underground into a surveillance dragnet that can hoover up all sorts of interesting metadata… hostnames, hardware identifiers, traveling patterns, DNS queries, SNI requests… and an untold amount of unencrypted communications across weird protocols and devices..
I’m not sure about the privacy implications of this whole setup. It’s basically turned the underground into a surveillance dragnet that can hoover up all sorts of interesting metadata… hostnames, hardware identifiers, traveling patterns, DNS queries, SNI requests… and an untold amount of unencrypted communications across weird protocols and devices..