Hi, maybe this part is not entirely clear, but everywhere RCS was enabled by Apple, it works.

The thing is, outside China and a few other exceptions, there's no MNO infrastructure. It's Jibe or nothing.

Google seems to run several "catch all" domains to provision Google Messages with the IMS configuration in all countries where Jibe is running, for instance:

config.rcs.mnc${MNC}.mcc${MCC}.jibecloud.net

While the iOS client should default to 3GPP well-known configuration domains:

config.rcs.mnc${MNC}.mcc${MCC}.pub.3gppnetwork.org

But in almost all cases this should be Jibe endpoints too.