Old Facebook Messenger for Windows10 Mobile.
Follow These Steps.
Step 1. Turn on Deverloper Mode on your windows10 mobile.
Step 1. Download WP8.1 SDK Tools Lite Setup Av1.20.
Step3. Download Old Facebook Messenger.
Step4. Install WP8.1 SDK Tools Lite Setup Av1.20.
Step5. After That Open Windows Phone Application Deployment 8.1.
Step5. Set Target to Device.
Step6. Click on Browse in front of the XAP field and locate your downloaded Old Facebook Messenger.
Step7. Make sure your device’s screen is unlocked. Then click on Deploy at the bottom right of the window.
Step8.After a few seconds, the application will show a XAP Deployment Complete status.
Step9. Enjoy your Old Facebook Messenger