Datasheet

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File manager： you can check all the available files under this section and
manage them
How to install apps yourself?
In order to install an app, please copy the *.APK file of that app in a folder
of choice. Then open the File Manager app in the Apps section and press
the APK file. This will install the app.
In order to find the APK file of your app, simply use a search engine.
Alternatively there are websites that allow you to download any APK file
from the Google Play store on a desktop computer.