While was historically a popular third-party client for accessing Facebook Chat on Java-enabled (J2ME) feature phones, it is no longer a viable or recommended option. Current Status and Compatibility
The backbone of the app was the Extensible Messaging and Presence Protocol (XMPP). In its early days, Facebook allowed external clients to connect to its chat servers via XMPP. mSonar leveraged this to create a real-time chat experience. It felt instantaneous compared to refreshing a web page. facebook chat by msonar for java phones
Have memories of using Msonar’s Facebook Chat? Share your story in the comments below (or, ironically, on Facebook). And if you have a preserved .JAR file, consider uploading it to a public archive before it’s lost forever. While was historically a popular third-party client for