UnrealEngine VR project can't be runned on a real device on my mobile phone!

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UnrealEngine VR project can’t be runned on a real device on my mobile phone!

I am currently developing a VR application that uses WBP to display the menu, then the roller coaster starts moving and you can look around the world in 360 degrees!

Development environment: UE4.27
Test device: Galaxy A7 (Android 10)

However, even though I followed the official documentation and managed to successfully package and install the application without errors while resolving some errors, but after touching the app icon, the screen goes black for a moment and the screen just rotates to the side, but it never starts properly!

the official documentation:

Then I tried to run it with a simple UnreaiEngine project, but that failed as well!
simple UnreaiEngine project is:

(1) UE4.27 says that GoogleVR is deprecated, so is it impossible to start with?
(2) I’m not getting any errors, but is there anything else I need to set up on the UE4.27 side?
(3)Is it necessary to install CardBoard?
(4)Is the Galaxy A7 not compatible with VR applications in the first place?

I have so many questions!
I’m a beginner, so maybe I don’t have some important, fundamental knowledge or concept…

Please let me know if there is any way to improve it.
Even if you can only answer one part of my question, I would be very grateful.

Please someone help me because I am having a very hard time with this problem!

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(disclaimer: we’re the author of the suggested “Cardboard VR” plugin below)

The GoogleVR plugin shipped with UE4 is deprecated since UE4.24 and the last version supporting iOS was UE4.21. Reports suggest it was crashing on all the supported platforms (Android and iOS) since UE4.21. In the mean time, Google abandoned the old SDK (the one used by the GoogleVR plugin) and started developing a new SDK for Cardboard. This new SDK is the one integrated by our “Cardboard VR” plugin.

I think the last working version of GoogleVR was for UE4.20.

If interested in developing for Google Cardboard, you could look at our plugin “Cardboard VR”, that integrates the new Google Cardboard SDK in UE4 and UE5, for both iOS and Android: Cardboard VR in Code Plugins - UE Marketplace .

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