>I'm on a cellular network in the UK

>My phone get an IPv6 address only, no IPv4

Please tell me which network so I can immediately switch.

Three unfortunately still don't use IPv6, and I'd prefer if my phone were IPv6-only than IPv4-only since everything else in my life is IPv6 capable -- all my servers, my home Internet, my email provider, etc...

EDIT: So it seems some people have gotten IPv6 addresses from Three last year - e.g. https://twitter.com/Mythic_Beasts/status/1195292901191892992 - so perhaps I just need to wait for Three to enable it for everyone? Not going to wait forever though...