Even after the Symbian app died, Facebook maintained a Java MIDlet (M-261) for older phones.
Nokia E90 Communicator , a legendary Symbian S60 3rd Edition device, does not have an official, modern Facebook app supported by Meta today facebook app for nokia e90
The most reliable way is to use the built-in "Web" browser or a third-party browser. Even after the Symbian app died, Facebook maintained
: This was the gold standard for social media on Symbian. While primarily for Twitter, it had Facebook integration. You can check if the developer, Janole, still offers a version that functions, though support is extremely limited. While primarily for Twitter, it had Facebook integration
There was a promising third-party Symbian client called Sociality that aggregated Facebook and Twitter. It worked beautifully on the E90’s internal screen until Facebook forced OAuth 2.0 changes. The developer vanished in 2016.
: An ad-supported alternative that offered a Windows Phone-like swiping interface.