Apple has taken the first concrete step toward securing RCS messages on iPhone. The iOS 26.4 beta, released to developers today, includes a new toggle for testing end-to-end encrypted RCS messaging — though with significant limitations.
The feature builds on RCS support first added in iOS 18.1, which brought typing indicators, read receipts, and high-resolution media sharing to iPhone-Android conversations. Apple announced plans for encrypted RCS in March 2025, and the beta code suggests the rollout is now underway.
How It Works in the Beta
iOS 26.4 adds a new toggle in Settings > Apps > Messages > RCS Messaging, enabled by default. When active and available, a lock icon appears in encrypted chat threads — the same visual cue already used for iMessage conversations, which have been end-to-end encrypted since 2011.
Key limitations in the current test:
| Feature | Status |
|---|---|
| iPhone-to-iPhone RCS encryption | ✅ Available (gradual rollout) |
| iPhone-to-Android encryption | ❌ Not yet testable |
| Shipping in iOS 26.4 final | ❌ Will ship in a future iOS 26 update |
| Toggle in Settings | ✅ Enabled by default |
| Lock icon in threads | ✅ Visible in encrypted chats |
Not Shipping Yet
Apple was explicit in its developer release notes: “RCS end-to-end encryption is now available for testing in this beta. This feature is not shipping in this release and will be available to customers in a future software update for iOS, iPadOS, macOS, and watchOS.”
The current test is limited to iPhone-to-iPhone messaging — effectively only useful for users who have iMessage disabled. Cross-platform encryption with Android devices will come later, and carrier support will also be a factor.
Why It Matters
RCS has been the standard replacement for SMS, but its lack of encryption has been a persistent security gap. Apple’s move to test E2E encryption, even in limited form, signals that fully encrypted cross-platform messaging between iPhone and Android is on the roadmap for 2026.
The beta is rolling out gradually — having the toggle visible doesn’t guarantee the feature is active on your device yet.
Source: 9to5Mac
