Apple has officially released iOS 26.5 , marking a major evolution in the way iPhone and Android messages users exchange . The most significant change in the release is the integration of end-to-end encryption (E2EE) into the RCS protocol , which is considered the modern successor to traditional SMS. The new feature is part of a broader strategy by the mobile industry for more secure, unified and interoperable communication across different ecosystems.
The feature is rolling out to iPhone users with iOS 26.5, in partnership with carriers that support the upgraded RCS, and requires the latest version of Google Messages for Android users. Encryption is automatically enabled on both new and existing conversations, offering a single layer of protection without the need for manual configuration by the user.
See also: iOS 26.5: E2EE in RCS Messages between iPhone and Android
The transition from SMS to RCS and the role of encryption
RCS (Rich Communication Services) is a modern messaging protocol based on web infrastructure and offers an experience comparable to applications such as WhatsApp or iMessage. Users can send high-resolution photos and videos, see real-time typing indications and receive read receipts, significantly upgrading the communication experience compared to classic SMS.
With the addition of end-to-end encryption, RCS messages gain a level of security previously unavailable to the protocol in an interoperable environment. This means that the content of conversations is protected all the wayfrom the sending device to the receiving device, and cannot be read by third parties, including providers and intermediaries.
Apple and Google confirm encrypted experience
According to Apple, users will be able to identify protected conversations thanks to a lock icon that appears within the RCS messaging interface. The company emphasizes that encryption is active by default, offering an “invisible” layer of security that does not require additional settings from the end user.
See also: Gmail: End-to-end encryption on iOS and Android for Workspace users
Google has confirmed that Android users using Google Messages will also see a secure communication, further enhancing the system’s transparency. This interoperability is critical as it marks the first time RCS has a common level of security between the world’s two largest mobile ecosystems.
Apple, Google and GSMA collaborate on a single security standard
The implementation of RCS encryption is the result of a collaboration betweenApple, Google and the GSMA, the organization that sets standards for mobile communications. As a GSMA spokesperson said, this development is the result of a multi-year cross-industry effort aimed at creating an open and globally accepted framework for secure communications.
This collaboration is particularly important, as until recently, secure messaging between iOS and Android was largely dependent on third-party apps. With the new RCS model, security is now built into the operating system itself, without the need for additional apps.
Beyond Messages: Critical Security Fixes in iOS 26.5
In addition to the RCS upgrade, iOS 26.5 comes with more than 50 vulnerability affecting key iPhone and iPad subsystems. These include fixes to WebKit, ImageIO, kernel, mDNSResponder , and other critical components of the operating system.
See also: GSMA: End-to-end encryption for RCS messages – Secure Cross-Platform Messaging
These vulnerabilities could, in different scenarios, allow sensitive data leakage, application crashes, or even denial of service (DoS) attacks at the system level. Particular attention is paid to the fixes for WebKit, as it is used not only in Safari but also in a number of applications that display web content.
Why the new version is considered crucial for security
The overall picture of iOS 26.5 shows a clear strategic shift towards strengthening security at the infrastructure and communication level. RCS encryption significantly reduces the risk of message interception, while extensive security fixes shield the operating system against modern vulnerability exploitation.
In an era of increasingly sophisticated cyberattacks, Apple is working to create a more resilient ecosystem where security is not an add-on feature but a default. For users, the iOS 26.5 update is not just a feature enhancement, but a significant step towards more secure and reliable digital communication.
