a small return on a problem of screen blocked.
The buttons were functional, but not the screen.
Si, I pressed the 3 keys, volume up, volume down and on / off, to reboot and I found all the features of the screen.
if my adventure can help other users ...

long life has blackview.

I can not change the ringing of calls, I have card1 and card2, I'm fine in the music folder, but I still have the same music