The simplest solution: Use Chrome 50 or Firefox 48 (both compatible with Android 4.1.1) and bookmark m.facebook.com. Pin this shortcut to your home screen. It looks like an app, uses fewer resources, and is always up to date on the server side.
If the APK is on your computer:
If you are downloading directly on the device: facebook katana apk android 411
The search term "Facebook Katana APK Android 4.11" typically refers to users attempting to install the Facebook application on older Android devices running version 4.1.1 (Jelly Bean) or seeking a specific legacy version of the app. The simplest solution: Use Chrome 50 or Firefox
Here is a breakdown of what "Katana" means, why users look for these files, and the risks involved. If you are downloading directly on the device: