When you remove something from Facebook, it is permanently removed from your account. It’s been deleted from our servers and backup systems, so we can’t recover this deleted material.
Connect the Android device to your PC and launch Stellar Data Recovery on it. Download the program on the PC (Windows-based PC) and run the data recovery tool to scan any missing or deleted messages. Following the scan, you’ll be given a one-click preview of emails, documents, videos, and photographs.
Move to Settings on your Android phone and scroll down to Account. If prompted, log in using your account and password. Look for a button called Backup & Restore. Select it and then tap the Recover option.
What happens, though, when something is “deleted”? When a person deletes something on Facebook, the system is able to ensure that they will not see the deleted post. That does not imply, however, that all traces of that content are completely destroyed or that Facebook can’t recover it.
Before You Continue: Remember that Facebook keeps all of your deleted information for 90 days. If you try to recover messages after the 90-day period, you’ll have a better chance of recovering deleted communications. On their website, you may always get more information by visiting the Messenger Help Center.