Downloading IPAs from sources other than the App Store generally violates Apple’s Terms of Service and End User License Agreement (EULA). Furthermore, "cracked" or decrypted IPAs violate intellectual property rights if distributed without permission. While digital preservationists argue for the "Right to Repair" and archiving digital history, the legal landscape remains restrictive.
A jailbroken iOS 7.1.2 device (using Pangu7 or evasi0n7) allows installation of IPAs without signing, but it does not fix the server-side API incompatibility. Tweaks like LowerInstall (spoof iOS version) will not work because Facebook’s modern binary cannot run on 32-bit or missing frameworks. Facebook Ipa Ios 7.1 2 Download
Here is the most reliable method using 3uTools (Windows) or Cydia Impactor (Mac/Windows). Note: Cydia Impactor has frequent revocation issues. Downloading IPAs from sources other than the App