@"Cleopatra"
Hi, I followed your instructions.
When I bought the phone, after selecting OEM unlock in developer options, rebooting in fastboot mode through adb, and unlocking bootloader, the first time I booted though PC into TWRP 3.0.2 I made a full backup.
I tried to follow your last guide in which you say to back up nvram through TWRP and flash again the whole Rom by Sp Flash Tool with the option "Format all + download".
I backed up the nvram and flashed the ROM.
But when I turn on the phone it stucks on the logo "vernee powered by android". No boot animation, no boot of system, nothing else.
I tried Flash TWRP by Sp Flash Tool but when I select "Recovery mode" appears in background the logo of vernee and nothing happens. So I can't boot into TWRP.
I tried boot TWRP by fastboot with pc, but it says that I'm not allowed because the bootloader is locked.
I tried unlock bootloader by PC, but the phone says I'm not allowed unlock OEM (I suppose because in developer options is not enabled the option OEM unlocking, and I can't do that as the device don't boot).
I tried follow all steps again, nothing changed.
If I select the option "Root integrity check" into stock recovery appears a message that says:
"--mount system fail
load source zip file fail
System check FAIL!!"
I'm getting crazy!! Help me please