How do you turn on RCS messaging in iOS 18?

[baryon]

I have an iPhone 13 mini and was happy to hear that Apple will finally support RCS with iOS 18. I've been using iOS 18 since release but to my disappointment, I still get green bubbles with non iOS users, and I assume, I'm still getting billed for every single SMS.

So what's up with this? I thought RCS was supposed to work now. Do I have to turn it on somehow?

 

[hg.wells]

Settings > Apps > Messages > RCS Messaging

RCS Messages will still show as green messages, only iMessage shows as blue.

 

[TimFL1]

Your carrier has to add support for RCS. If it‘s not showing for you in the Messages settings, your carrier does not support RCS yet.