Navigate to the download folder and open the downloaded APK file. The size of the beta update is 563 MB, and requires at least 1 GB of free space in the device.
Allow installation of unknown sources by navigating to Settings> Safety and Privacy> Install apps from unknown sources.
Click on the ‘Install’ option after going back. The installation process will take up 10 minutes, depending on your phone.
After completion of the installation, open the PUBG Mobile Lite beta app and ‘Sign In’ using the ‘Guest’ account.
In case you get an installation error, try downloading the update again.
After following the steps above, the game will ask you to update to the latest version. Simply click on the ‘Update Now‘ button and you will become an early beta tester for the PUBG Mobile Lite 0.18.4 version.