Yes, T-Mobile for example. I just dumped the interface information from my iPhone and the only address available is an ipv6 address. Everything else is put thro

Yes, T-Mobile for example. I just dumped the interface information from my iPhone and the only address available is an ipv6 address. Everything else is put through an ipv6 to ipv4 gateway. Works fine. Apple has required app developers to support ipv6 only deployments since 2015: https://developer.apple.com/support/ipv6/ https://developer.apple.com/support/ipv6/