Ensure you download the exact com.facebook.katana_1.9.9.apk file from a reputable APK mirror archive. Verify the MD5 checksum if possible to avoid malware.
★★★★☆ (4/5) – Perfect for retro enthusiasts; useless for modern power users. Have you tried running this version on a vintage phone? Let us know in the comments below. Facebook for Android 1.9.9 APK Download
Open your file manager, tap the APK, and select "Install." Ensure you download the exact com
Go to Settings > Security and enable "Unknown Sources" (Allow installation of apps from unknown sources). tap the APK