I am trying to root my Android device (the one in title) without success and I would really need it because of work reasons (in order to access app Caravel data and recover them in case the app does not start anymore).
I have followed many tutorial like the this and they all say the same thing. I have tried with many SuperSU BETA versions which I installed by flash from TWRP, as the tutorial say. The one which seems to work is 2.65; in fact, beta versions seem to block and freeze the device at boot. It just shows the logo and block. Instead, with 2.65 this does not happen. Then, superSU asks to be fully installed from play store but at the end I am not root. I checked with Root Browser and root checker and it seems that nothing worked.
What am I missing? Which is the correct procedure?