Help!!! Unbrick Huawei p9 Lite Vns-L31

[Miss Montage]

Have you started the flashing procedure with board firmware (.dgtks ?)

[punkynaro89]

what would?

[Valdemaras]

here is what reported from the last update you reported
:
Writing rescue_recovery partition with file recovery
rescue_recovery partition UPDATE ...OK
Looking for device in upgrade mode...
COM51: Android Adapter PCUI (COM51)
COM52: DBAdapter Reserved Interface (COM52)

05/05/2018 23:05:31 Starting to write device in UPGRADE mode...
File to update: VNS-L31_C02B329_Firmware_Portugal_Vodafone_Limited.APP
Validating file...
Looking for attached port...
Preparing to write...
Writing partition: SHA256RSA...OK
Writing partition: CRC...OK
Writing partition: CURVER...OK
Writing partition: VERLIST...
Error downloading file VNS-L31_C02B329_Firmware_Portugal_Vodafone_Limited_3.d twork, partition: VERLIST
Error writing software

05/05/2018 23:05:43 Starting to write device in UPGRADE mode...
File to update: update_VNS-L11_C02B329_vodafone_default.APP
Validating file...
Looking for attached port...
Preparing to write...
Device does not support this update file
Error writing software
05/05/2018 23:05:55 Writing device finished with ERROR

Cannot update device in upgrade mode

Please read the dc-phoenix guide, it is explained there why you get this error and how to solve it. You need to repair vendor/country accordingly to new files that's you are about to flash into your device first.

[punkynaro89]

have patience, for me it is difficult for Italian to translate and understand the site well ... can you give me a link?

[Miss Montage]

NOTE: If you get error during flashing "VERLIST partition" or ANY of the first 6 partitions means your customization version is not same as before, you must do Step 2!
If flashing ended successfully, but phone still does not boot up - means you have flashed incorrect file - must use original Full Stock ROM that was in phone when it was purchased to have highest chance of repair. If phone still does not boot up read Method 2

Step 2 (not required if flashing successful in Step 1)

After flashing in fastboot, phone should be able to boot up now. If phone still does not boot up read Method 2
Now you need to rewrite model, vendor & country even if it remains same. They must match with customization file that you want to flash.

NOTE: keep in mind that Vendor/Country and Model fields are case sensetive!

HCU repair guide HERE
After repair on HCU repeat Step 1

If this method did not help, read further available methods below...

Source