If you have an actual .jar file from the Mobile9 era, here is how to reverse-engineer it to connect to a custom XMPP server (because Facebook’s is dead).
A: In 2015, Facebook shut down its XMPP chat gateway. The Java app relied on this protocol. Without it, the app throws "connection refused." facebook chat download mobile9 java
| Method | Compatibility | Works in 2025? | | :--- | :--- | :--- | | | Most Java phones (MIDP 2.0) | ✅ Yes | | Facebook via SMS | Any phone with SMS | ✅ Yes (limited) | | KaiOS Messenger | Newer feature phones | ✅ Yes | | Java Facebook App (Mobile9) | Old Nokia/Sony Ericsson | ❌ No (server dead) | If you have an actual
Note: As of 2025, direct downloading from Mobile9’s legacy Java section is unreliable. Most original links now redirect to their Android app store. However, archives like the Wayback Machine preserve many .jar files. Without it, the app throws "connection refused