Apple is starting to test end-to-end encrypted (E2EE) RCS messages with the developer beta of iOS 26.4 released Monday. Apple announced plans last year to support the feature, and once fully available, it will let iPhone and Android users send encrypted RCS messages to each other across platforms. However, with this initial implementation, Apple is only testing RCS encryption between Apple devices. The company also doesn’t plan to ship E2EE RCS messages with iOS 26.4; the feature will actually ship publicly in a “future update,” Apple says. RCS messages significantly improve the experience of texting between iPhone and Android devices, but cross-platform encryption has been a big thing missing.