[Windows Phone 8 Q&A, Help & Troubleshooting] dbalint:
Hi, My product Code is: 059T671, the downloaded ffu is: RM892_3051.50009.1424.0001_RETAIL_apac_taiwan_328_01_439490_prd_signed.ffu

And here is the log file of thor2 flashing:

Initiating FFU flash operation

WinUSB in use.

isDeviceInNcsdMode

isDeviceInNcsdMode is false

Device mode 6 Uefi mode

[THOR2_flash_state] Pre-programming operations

Disable timeouts

Get flashing parameters

Lumia Flash detected

Protocol version 1.18 Implementation version 2.2

Size of one transfer is 2363392

Size of buffer is 2359296

Number of eMMC sectors: 30535680

Platform ID of device: Nokia.MSM8960.P6023.3.2.1

Async protocol version: 01

Security info:

Platform secure boot enabled

Secure FFU enabled

JTAG eFuse blown

RDC not found

Authentication not done

UEFI secure boot enabled

SHK enabled

Device supports FFU protocols: 0031

[THOR2_flash_state] Device programming started

Using secure flash method

CoreProgrammer version 2015.03.09.001.

Start programming signed ffu file C:\ProgramData\Microsoft\Packages\Products\rm-892\RM892_3051.50009.1424.0001_RETAIL_apac_taiwan_328_01_439490_prd_signed.ffu

FfuReader version is 2015021601

Send FlashApp write parameter: 0x4d544f00

Perform handshake with UEFI...

Flash app: Protocol Version 1.18 Implementation Version 2.2

DevicePlatformInfo: Nokia.MSM8960.P6023.3.2.1

Unknown sub block detected. Skip...

Unknown sub block detected. Skip...

Supported protocol versions bitmap is 31

Secure FFU sync version 1 supported.

Secure FFU async version 1 supported.

Secure FFU sync version 2 supported.

Secure FFU async version 2 supported.

Secure FFU async version 3 supported.

Get CID of the device...

Get EMMC size of the device...

Emmc size in sectors: 30535680

CID: Samsung, Size 14910 MB

Start charging...

Requested write param 0x43485247 is not supported by this flash app version.

Start charging... DONE. Status = 0

Unable to send ECHO REQ or ECHO REQ not supported

Get security Status...

Security Status:

Platform secure boot is enabled.

Secure eFUSE is enabled.

JTAG is disabled.

RDC is missing from the device.

Authentication is not done.

UEFI secure boot is enabled.

Secondary HW key exists.

Get RKH of the device...

RKH of the device is CD84376222AAF204C85119532BF34EA55C8844E4CEA35F3E508D25AA34D96637

Get ISSW Version...

Get ISSW Version, SKIPPED!

Get system memory size...

Size of system mem: 1048576 KB

Send backup to RAM req...

Clearing the backup GPT...SKIPPED!

Successfully parsed FFU file. Header size: 0x000e0000, Payload size: 0x0000000065800000, Chunk size: 0x00020000, Header offset: 0x00000000, Payload offset: 0x00000000000e0000

RKH match between device and FFU file!

Option: Skip CRC32 check in use

Start sending header data...

FlashApp returned reported error in SecureFlashResp!

Status: 0x1106, Specifier: 0x80000003

FA_ERR_FFU_SEC_HDR_VALIDATION_FAIL

Send of FFU header failed!

[IN] programSecureFfuFile. Closing C:\ProgramData\Microsoft\Packages\Products\rm-892\RM892_3051.50009.1424.0001_RETAIL_apac_taiwan_328_01_439490_prd_signed.ffu

programming operation failed!

0xFA001106: Signature check of FFU file fails. Reason(s): The FFU file is not correctly signed or not signed for this device.

Operation took about 1.00 second.

Unknown error code.

THOR2 1.8.2.15 exited with error code -100658938 (0xFA001106)