Use a reputable APK indexing site like APKMirror or APKPure. Search for "Facebook Messenger" and filter the results by targeting versions from 2016 or 2017. Look for variants listed as compatible with Android 4.0+.
Meta occasionally blocks older application handshakes for security reasons. If your login details are correct but fail on the app, you must switch to the mobile browser alternative, as the application can no longer securely communicate with Meta's modern authentication servers. "Out of Memory" Crashes facebook messenger for android 4.4.2
To use Messenger on 4.4.2, you need to sideload the . Use a reputable APK indexing site like APKMirror or APKPure