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Use tools like Windows Phone Developer Registration or Interop Tools (found on XDA) to unlock your phone.
Do not use the official XAP. Use the "Web App" feature of Windows Phone. Pin m.facebook.com to your start screen. It acts 90% like a native app and is technically more "new" than any XAP you will find.
You cannot simply run a XAP directly from the phone's file explorer on older OS versions. You need a Windows PC. facebook windows phone xap new
Side-loading unverified files could brick the phone or compromise his data.
Tap on (Windows 10 Mobile) or Developer Settings (Windows Phone 8.1). Select and toggle on Developer Mode or Sideload Apps .
Since XAP deployment is cumbersome:
To install a "new" Facebook XAP (or APPX for Windows 10 Mobile), you must have a "developer unlocked" device or use an emulator.
What is it currently running (e.g., WP 8.0, 8.1, or Windows 10 Mobile)?
of old parties and long-gone cafes filled the screen. The Chat function pinged. 🔮 Use tools like Windows Phone Developer Registration
Later, Facebook took over development, delivering a more feature-rich (but slower) app based on ported code.
Download and install the or Visual Studio deployment binaries on your PC.
These communities have bots that serve .xap files. If you ask for a "new Facebook XAP," they will direct you to version , dated October 2016. This is currently the most functional build for WP 8.1. You need a Windows PC