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RCS encryption surfaces in iOS 26.4 developer beta, but testing is extremely limited

Apple has taken a small step toward securing cross-platform messaging, with early RCS encryption support now appearing in the iOS 26.4 beta. Just don’t expect to get that much testing done right now.

RCS support will be added to the iPhone sometime in 2024
RCS support will be extended to include end-to-end encryption

Way back in March 2025, Apple announced that it would add support for end-to-end encryption to RCS messaging on iPhone. At the time, there were very few details about when the feature would be implemented.

We got our first hint that the feature was, at the very least, being worked on in January.

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