how to system apk stuff

Adding pre-built APKs to system apps on Android requires a rooted device and can be done using the following steps:

    Download and install a file manager app with root access, such as ES File Explorer.

    Locate the pre-built APK file you want to add to the system apps. This file can be downloaded from the internet or obtained from a third-party source.

    Copy the APK file to the /system/priv-app directory on your device. You may need to mount the /system partition as read/write before you can copy the file.

    Change the permissions of the APK file to 644 (rw-r--r--). This can be done using the file manager app or a terminal emulator app with root access.

    Restart your device to apply the changes.

Note: This process is not recommended for novice users, as it involves modifying the system files on your device and could potentially cause stability or security issues if not done correctly. It is recommended to research and understand the implications of this process before attempting it, and to always backup your data before making any significant changes to your device.

I'm not that experienced in this regard, so I looked through forums and this is what looks about right.