Go to Settings > Security > check the box for Unknown Sources .
Downloading APKs from the web carries risks. Always use reputable sites and avoid "Modded" or "Hacked" versions of Facebook, as these often contain malware or could lead to your account being banned. facebook apk for android 412
Will likely cause "lag" or crashes on devices with less than 1GB of RAM. How to Install Facebook APK on Android 4.1.2 Go to Settings > Security > check the