ExtremeTech

iOS 26.4 Beta Tests Fully Encrypted RCS Chats Between iPhone and Android

Apple notes that the encrypted messages are just a test and aren't available for all devices, carriers, or regions yet.

iOS 26.4 beta adds support for testing end-to-end encrypted RCS messaging

Apple added RCS support to iPhone with iOS 18.1, enabling richer cross-platform messaging between iPhone and Android users. This ...
Android Authority

Texting between Android and iPhone could soon get a major security upgrade

Apple previously confirmed plans to add end-to-end encryption to RCS messages in a future software update We’ve now spotted code that suggests end-to-end encryption could be coming to RCS messages on ...

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.