The native app used to handle this, but it fails now.
Before diving into the download process, it is important to understand the hardware and software you are working with. The Nokia 700 runs on (later upgradeable to Belle FP1/FP2). At the time, it was revolutionary for its ClearBlack display and compact design. Facebook App Download - For Nokia 700
If the native Symbian app fails to install, use the Java version. The native app used to handle this, but it fails now
While you cannot download a modern "app" from a standard store, here is how you can still access Facebook on this device: The Browser Method (Recommended): Facebook App Download - For Nokia 700