@advocatux ok, I think we are done. In the previous OS version I had on my phone
android-gadget-service enable rndis
was enough. Reading the guide you posted I found out there is a
sudo tethering enable
to be executed. I tried and now this post is flowing through my BQ E4.5
Now I have just two more questions: before to see the command I had already enabled RW permissions on my device. Is there a way to go back to RO without reinstalling the OS or is it impossible as described here? Should I be scared of having a RW OS or is it ok?
Thank you for the support up to here.