Carriers have experienced a security breach, leading the FBI to recommend utilizing platforms equipped with full end-to-end encryption. However, Apple's implementation of RCS does not provide this capability, resulting in Android-to-iPhone conversations being encrypted only during transmission.

While Google Messages incorporates Signal Protocol for end-to-end encryption, this feature is built on the RCS Universal Profile developed by Google. The GSMA is currently working on a standardized end-to-end encryption solution for the Universal Profile, but there is no definitive timeline for its deployment.

For Android users with friends on iPhones (and vice versa), recent updates with the release of iOS 18 have significantly improved chat security. Although Apple has now added support for RCS, it does so solely using the upstream provisions. In contrast to Google Messages, which includes additional features beyond the standard RCS Universal Profile, Apple's version remains relatively basic. While progress is being made by the GSMA on an encryption system for the Universal Profile, it appears that a final solution is still several months away with no specific timeline provided.

In early December, reports emerged highlighting that the Chinese hacking group Salt Typhoon had compromised over a million devices, prompting the FBI to advise Android and iPhone users to refrain from texting each other on insecure platforms.

What platforms offer end-to-end encryption?  
Although RCS chats are already encrypted during transmission between Android and iOS devices, they are decrypted upon reaching the carrier's side, which is where the data breach occurred. Given this context, it may be prudent to heed the FBI's advice and opt for a fully encrypted messaging platform in the interim. Such platforms, available across major operating systems including desktop, provide genuine encryption for all content.

If this option does not align with your preferences, WhatsApp is a widely used alternative, particularly outside the United States. Telegram is also available, but its end-to-end encryption is not comprehensive, as both staff and governmental authorities can access user messages. However, Telegram has demonstrated a commitment to revealing data only if a court order substantiates the likelihood of terror threats.