[miomao]

I tried to downgrade my nokia 1 plus. I found a signed zip from official google link. I extracted the files and tried to download with SP Flash Tool 5.1916, it's stuck on Download Boot loader 0%, so I flashed + download and all is lost.
I tried the latest version of SP Flash Tool 5.2032 and give me the error STATUS_SEC_PL_VFY_FAIL when I try to format and download the files.

I found this on web

Code:

Error 0xC0020006: ERROR: STATUS_SEC_PL_VFY_FAIL (0xC0020006)

Meaning: The device likely has a protected preloader or bootloader.

Solution:

    Try using a signed ROM/firmware.
    Try unlocking the bootloader before flashing.

I haven't signed files, I have only signed zip.
Now the phone give me only a VCOM. Can I repair it?
Can I unlock it from preloader, so I can download all firmware?

[miomao]

Sorry I feel stupid I forget this thread https://www.hovatek.com/forum/thread-23528.html
I used the correct DA and works.
That DA doesn't work on latest version of SP Flash tool but only until 5.1916.
After downgrade I receive a dm-verify error, so I restored backup.

[X3non]

...

i know you have fixed this device but can you check and compare the settings of both spft v1916 and v2032?
launch the tool > Options > Option...
compare GENERAL and DOWNLOAD settings

that might help tell why one failed where the other worked

[miomao]

that might help tell why one failed where the other worked

My issue was on the used DA.
I tried on windows and linux. SPFT 1916, 2032 win not load the specific DA for Nokia 1 Plus, so I used the default DA which give me the error. SPFT 1916 on linux load the DA and works. I can't test SPFT 2032 linux because there is a check on kernel version, I have 4.19.0 and SPFT 2032 want almost 4.19.14.
I will post more details, because I want to understand because the DA can't be loaded everywhere.

[X3non]

...because I want to understand because the DA can't be loaded everywhere.

it can be loaded into any tool so long as the necessary settings are put in place
e.g if you were getting lib da not match error in windows then you only need to disable this in spft's settings

[miomao]

e.g if you were getting lib da not match error in windows then you only need to disable this in spft's settings

In linux the setting "Check Lib DA match" in General doesn't exist. Ok now I can use spft everywhere, but I prefer use it in linux.

For dm-verify error I fixed with update to Android 10 from recovery and adb sideload signed zip from google. If I restore the backup maked with spft and restored with spft I got dm-verify error.