If you're looking for a specific Facebook version that works well on Android 4.1.2, try downloading an older version of the app. Facebook's older versions are often more compatible with older Android devices:
However, the "best" way to experience Facebook on such an old device is actually through Facebook Lite. Designed specifically for 2G networks and low-end hardware, Facebook Lite uses significantly less data and battery. Even then, the official Play Store version may not install on 4.1.2. In this case, downloading a legacy version of Facebook Lite is often more successful than attempting to run the full-sized application, which is prone to crashing on older kernels. Download Facebook For Android 4.1.2 BEST
: If the modern Lite app fails, you can manually install an older "legacy" version of the standard Facebook app. Version v281 : This is widely considered the last stable version to officially support Android 4.1+. Where to find it If you're looking for a specific Facebook version