Hi Jamesong,
I spoke to the Android dev regarding that device. You should have no problems beginning development with it, but you should consider the documentation limitations as still standing at this point in UE4 development on mobile devices.
That does not mean that you can’t attempt to work outside those parameters in your own development, you just need to consider those as possible issues to roll back if you exceed the limitations and begin seeing problems in your project.
Good luck! If you are able to make progress outside the documentation, be sure to post here for other users.