I decided to wipe it through fastboot but it did not work: I tried many times, the terminal says "OKEY finished" but then the device is just like before, nothing wiped, nothing flashed
I cannot understand what's happening, everything I do seems to be restored to previous state after It reboots
Just one detail one time after rebooting it managed to connect to the internet and on the notification box it appears something that was quite similiar to a spam but I could not read it completely since it rebooted
It was totally stock before the error: neither rooted nor custom rom
thanks for any help!