This version supports "offline likes." You can scroll through your feed on the subway, react to a post with a heart or a laugh, and the app queues the reaction. Only when you reconnect does it sync. The latest versions require a constant ping, draining your battery faster.
Users often look for specific older builds like 412.0.0.0.5 to bypass issues introduced in newer updates. facebook 4120005 apk older versions for and exclusive