Apple is testing secure messaging between Android and iOS devices with iOS 26.4, iPadOS 26.4, and macOS Tahoe 26.4. The updates introduce end-to-end encryption (E2EE) for RCS messages, a security feature that is not currently available for cross-platform messaging. Apple has been working with the GSM Association to implement E2EE for RCS messages. iMessage, the messaging protocol for sending texts between iPhones, has long supported end-to-end encryption.