Apply suggestion from code review

Co-authored-by: fria <[email protected]>
Signed-off-by: redoomed1 <[email protected]>

Author: redoomed1

docs/os/ios-overview.md

@@ -212,7 +212,7 @@ Normal phone calls made with the Phone app through your carrier are not E2EE. Bo
 
 ### Encrypted iMessage
 
-The color of the message bubble in the Messages app indicates whether your messages are E2EE or not. A blue bubble indicates that you're using iMessage with E2EE, while a green bubble indicates the other party is using the outdated SMS and MMS protocols. Currently, the only way to get E2EE in Messages is for both parties to be using iMessage on Apple devices.
+The[ color of the message bubble](https://support.apple.com/en-us/104972) in the Messages app indicates whether your messages are E2EE or not. A blue bubble indicates that you're using iMessage with E2EE, while a green bubble indicates the other party is using either the outdated SMS and MMS protocols or RCS. RCS on iOS is **not** E2EE. Currently, the only way to have E2EE in Messages is for both parties to be using iMessage on Apple devices.
 
 If either you or your messaging partner have iCloud Backup enabled without Advanced Data Protection, the encryption key will be stored on Apple's servers, meaning they can access your messages. Additionally, iMessage's key exchange is not as secure as alternative implementations like Signal's (which allows you to view the recipients key and verify by QR code), so it shouldn't be relied on for particularly sensitive communications.