From fragile SMS to encrypted RCS between iPhone and Android
For years, texting between iPhones and Android phones defaulted to old-school SMS and MMS, which are not end-to-end encrypted and can be intercepted in transit. Apple’s adoption of RCS in iOS 18 started to modernize those “green bubble” conversations with read receipts, typing indicators, and higher-quality media. The catch: cross-platform RCS chats were still not end-to-end encrypted, leaving a glaring privacy gap compared with blue-bubble iMessage threads. That gap is finally closing with the rollout of iOS 26.5 and the latest version of Google Messages. Apple’s new update adds full RCS encryption support on iPhone, while Google enables the same on Android, so RCS encryption iPhone Android messaging can now match the security of iMessage-to-iMessage chats. In practical terms, most green bubble texts encrypted between the two platforms are no longer readable in transit by carriers or service providers.
How Apple, Google, and the GSMA made cross‑platform encryption work
Delivering end-to-end encrypted messaging between rival ecosystems is technically and politically complex. Apple and Google worked together with the GSM Association to standardize encryption in RCS Universal Profile 3.0, using the Messaging Layer Security protocol as the cryptographic foundation. Instead of each company running a proprietary system, MLS allows both platforms to follow the same open framework for securing chats. On Android, the necessary support arrives via the latest Google Messages app; on iPhone, it comes with iOS 26.5, which adds end-to-end encryption for eligible RCS conversations. A small lock icon now appears in RCS threads when encryption is active, signaling that only the sender and receiver can read the messages. This collaboration effectively upgrades cross-platform message security, replacing the fragile SMS fallback with a modern, encrypted standard that works between iPhones and Android devices.
Green bubbles remain—but now they are truly private
One thing that has not changed is Apple’s color code: messages from Android users still appear as green bubbles on iPhones. That visual distinction continues to reinforce the cultural divide between platforms, but the technical reality underneath is very different now. With RCS encryption in place, those green bubble texts encrypted between iOS and Android can now have the same end-to-end protection that blue iMessage bubbles enjoy. You will know a cross-platform RCS chat is secured when the new lock icon appears in the conversation interface. Encryption is enabled by default for new compatible chats and is gradually being rolled out to existing ones. While the color might still signal “other” in Apple’s ecosystem, it no longer means “less secure.” The biggest privacy gap in cross-platform message security has effectively been addressed, even if the visual stigma lingers.
What everyday users need to do—and what still depends on carriers
For the new protection to work, three pieces have to line up: both people must be using RCS, both must be on compatible software, and their carriers must support encrypted RCS. Apple currently enables the feature only with specific carrier partners, while Google requires the latest Google Messages app. Where all of this is in place, RCS chats will automatically upgrade to end-to-end encrypted messaging with no extra setup. If you do not see the lock icon, your conversation may have fallen back to unencrypted SMS/MMS or to non-encrypted RCS. Users can check their messaging settings to ensure RCS is turned on, keep their operating systems up to date, and watch for carrier announcements. Even with these caveats, the rollout marks the moment when the “worst thing about texting an iPhone” is largely fixed: cross-platform messages are finally treated as private by default rather than an insecure fallback.