Messaging Channels

Explore the Extensible Messaging and Presence Protocol (XMPP), a decentralized XML-based communication standard defined by RFC 6120 & 6121. Understand JIDs (localpart@domain/resource), stanzas (<message/>, <presence/>, <iq/>), TLS security, and XEP extensions like OMEMO for encryption. Perfect for developers.

Explore iPhone's RCS messaging via iOS 18, enabling high-quality media sharing and read receipts across platforms. Learn about automatic vs. manual activation. Understand SMS/MMS fallback, dual SIM support, and troubleshooting. Discover IMS status verification for carrier support.