Flash RUU - signature checking... FAILED (remote: 12 signature failed)

Hello,

I tried to flash a RUU on my m8 but i am not successful currently.

I bought an m8 in china, last year. My sister tried an ota update, the phone lock on bot. So i tried to flash many rom but no success, every flash failed on the last step, the " verification signature checking... " with " FAILED (remote: 12 signature verify fail) ".

I unlock my bootloader but i'am s-on.

I give you my phone detail :

HTML Code:

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> fastboot getvar all

(bootloader) version: 0.5
(bootloader) version-bootloader: 3.19.0.0000
[B](bootloader) version-baseband: 1.29.214500021.12G
[/B](bootloader) version-cpld: None
(bootloader) version-microp: None
(bootloader) version-main: 6.12.401.4
(bootloader) version-misc: PVT SHIP S-ON
(bootloader) serialno: =°)
(bootloader) imei: =°)
(bootloader) imei2: Not Support
(bootloader) meid: 00000000000000
(bootloader) product: m8_ul
(bootloader) platform: hTCBmsm8974
(bootloader) modelid: 0P6B10000
[B](bootloader) cidnum: 11111111
[/B](bootloader) battery-status: good
(bootloader) battery-voltage: 0mV
(bootloader) partition-layout: Generic
(bootloader) security: on
(bootloader) build-mode: SHIP
(bootloader) boot-mode: RUU
(bootloader) commitno-bootloader: 76df2b54
(bootloader) hbootpreupdate: 11
(bootloader) gencheckpt: 0
all: Done!
finished. total time: 0.008s

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All my try have been in RUU mode (fastboot oem rebootRUU)

Can you provide me a link to a rom that can been flash on my device ?

Thank a lot in advance.

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