In iOS 18, users may notice a new indicator in their Messages app: "Text Message • RCS". This change signifies Apple's adoption of Rich Communication Services (RCS), a messaging protocol that enhances communication between iPhones and non-Apple devices, particularly Android phones.

RCS is designed to upgrade traditional SMS texting with features like:

  • Higher quality photo and video sharing
  • Read receipts
  • Typing indicators
  • Improved group chats
  • Larger file transfers

When you see 'Text Message • RCS' in your Messages app, it means your iPhone is ready to use the RCS protocol instead of standard SMS when communicating with compatible devices.

It's worth noting that Apple's implementation of RCS comes after years of pressure from competitors and users. While this addition does improve messaging between iPhone and Android devices, it doesn't offer the same level of integration or features as iMessage, Apple's proprietary messaging system.

Some key points to consider:

  • The RCS implementation doesn't include end-to-end encryption, a feature that could have been included to enhance user privacy.
  • The adoption of RCS doesn't change the 'green bubble' effect for non-iPhone users, a design choice that has been criticized for creating social pressure to use iPhones.

While the inclusion of RCS in iOS 18 is a step towards better cross-platform messaging, it's important to view this development in the context of Apple's broader strategy. The company has historically prioritized creating a distinct ecosystem, and this move, while beneficial for users, doesn't fundamentally alter that approach.

The 'Text Message • RCS' indicator appears automatically when your iPhone detects a compatible recipient. No user action is required to enable this feature. If RCS isn't available, your iPhone will default to sending a regular SMS, indicated by the standard 'Text Message' label.

How to turn on and use RCS Messaging on iPhone with iOS 18
Send enhanced messages between iPhone and Android with RCS messaging support in iOS 18

In essence, seeing 'RCS' in your Messages app means you're using an improved messaging protocol when communicating with non-Apple users. While this improves the messaging experience, it's a limited implementation that maintains distinctions between Apple's ecosystem and other platforms.