Apple yesterday released the latest iOS 18.4 beta and it enables support for RCS on Google Fi. iPhone users on the Google MVNO have been waiting for this improvement to Android-iOS messaging since September.With iOS 18.4 beta 2, the RCS Messaging toggle appears in Settings > Apps > Messages for Google Fi subscribers. The Waiting for activation process might take a moment.More broadly, iOS 18.4 appears to enable support for MVNOs that use T-Mobiles network in the US.When iOS 18 launched in September, RCS was just enabled for the big US carriers (AT&T, T-Mobile, and Verizon). Support for other providers rolled out with successive point releases. Apple maintains a Wireless carrier support and features for iPhone in the United States and Canada support article that lists RCS messaging status.Expect iOS 18.4 to go stable in April. There are a few more betas in the coming weeks with some notable changes already appearing. Alternatively, you can join the beta program now.Add 9to5Google to your Google News feed. FTC: We use income earning auto affiliate links. More.Youre reading 9to5Google experts who break news about Google and its surrounding ecosystem, day after day. Be sure to check out our homepage for all the latest news, and follow 9to5Google on Twitter, Facebook, and LinkedIn to stay in the loop. Dont know where to start? Check out our exclusive stories, reviews, how-tos, and subscribe to our YouTube channel