To install an older version of Facebook on a device running (such as an iPhone 6 or 5s), you can use the App Store's built-in compatibility feature. While the latest Facebook app typically requires iOS 13.4 or later , Apple allows users to download the last compatible version if the app was previously linked to their Apple ID. Steps to Install the Compatible Version

Before you proceed, understand that using a 7+ year old app version comes with serious consequences:

Hey friends! I know some of you might still be using older iOS devices, like iOS 12.5.5. I want to share some helpful tips on how to use Facebook on your device:

Steps:

Your device works perfectly fine. The screen isn't cracked, the battery holds a charge, and it plays music just fine. But when you try to open Facebook, you’re hit with the dreaded prompt: "Update required to use this app." And when you hit "Update," the App Store gives you the final blow: "This application requires iOS 13 or later."