Because Meta officially requires iOS 13.4 or later to install the current Facebook application, legacy devices locked out of newer operating systems cannot download it normally. Sideloading a compatible legacy or using specific cloud workarounds are the only reliable ways to restore Facebook access on these vintage devices. The iOS 12.5.5 Compatibility Dilemma
If you are looking for an IPA (application package) to sideload, there are safer ways to get the app working without downloading potentially malicious files from third-party sites: facebook ipa for ios 1255
: Tap the cloud. Apple will display a prompt: "Download an older version of this app? The current version requires iOS 13.4 or later, but you can download the last compatible version." Confirm to complete installation. Sideloading a Facebook IPA on iOS 12.5.5 Because Meta officially requires iOS 13
If the official method fails, you must manually sideload the IPA file. This process requires a computer and specialized management software. 1. Obtain a Clean IPA File Apple will display a prompt: "Download an older