Re: iOS 18 and RCS

Andy Burns wrote on Sun, 22 Sep 2024 14:21:11 +0100 :

I know next to nothing about Apple.

I know Apple but I know next to nothing (actually, nothing) of RCS.

Anyway, it seems users will have to enable RCS in order to use it, because why not protect the green bubble walled-garden?
<https://www.androidauthority.com/how-to-enable-rcs-messaging-on-iphone-to-text-android-users-3482571/#2>

Andy, Can you help me understand RCS based on the last sentence in that link?
 "Apple warns that user identifiers are exchanged for your carrier
  and their partners to authenticate your device and provide a   connection for RCS messaging. "These identifiers could include   but are not limited to your IMEI, IMSI, current IP address,   and phone number. Your current IP address might also be shared
  with other RCS users," the company notes."
It's long known that Apple murdered privacy (in other areas) but is this
sentence above about your loss of privacy only applicable to Apple's RCS?