It runs smoothly on devices with less than 1GB of RAM.
Avoid the temptation to download random APK files that promise you the "latest" version of the full Messenger app. They will almost certainly not work on Android 4.4.2, and they could harm your device.
You can still send text, photos, links, and stickers. Step-by-Step Download and Installation Guide
While this method brings back functionality, there are some trade-offs to consider when running older apps:
