it can be amazon table or any table or phone and try this TegraRcmGUI_v2.0_portable
https://github.com/eliboa/TegraRcmGUI/releases
https://github.com/eliboa/TegraRcmGUI/releases
I cannot remember it was on either 4.0.1 or 4.1.0 but not on 5.x.x
I updated it to 5.1.0 by myself.
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I do not have android phone :'(
Anyway, I don't see any mistake in my steps to send the payload.
So I am not sure if changing to NXLoader would help ?
I will try when I have an android phone on my hand.
Thanks.