Wap Facebook: Chat.jar

First, I need to explain what WAP is and its relevance. Then, clarify what a .jar file is in this context. Maybe they're looking for a way to chat with Facebook friends without internet data using Java on a feature phone. But I should check if such an application exists. Wait, Facebook has moved away from Flash and relies heavily on online services. Maybe the user is trying to access an older method of Facebook chat via WAP.