[T-Mobile HTC One (M8)] twill1987:
I am fixing a TMO Htc One M8 for a friend. He currently has TWRP recovery but nothing will wipe or flash. I have posted the get var information and the log below along with all the steps I've taken, please share any insight into the matter.

Here is the Get VAR Information. I have tried to fix this device by relocking the Bootloader, flashing stock RUU RUU_M8_TMOUS_1.57.531.7 , Flashing modified firmware.zip, flashing recovery.img, nothing. Then unlocking the bootloader, flashing Philz recovery.img, Twrp.img, still same error. Current TWRP recovery registers nothing but errors. No wiping data, cache, system, etc. No installing backup nandroid, no flashing new rom through external SD card or adb sideload. Literally the phone won't flash anything and the error is error 12, "Remote signature verifiey failed" What kinda insight do you have into this? Anyway to get back to stock?

Thanks!

(bootloader) version: 0.5

(bootloader) version-bootloader: 3.18.0.0000

(bootloader) version-baseband: 1.16.21331931.LA24G

(bootloader) version-cpld: None

(bootloader) version-microp: None

(bootloader) version-main:

(bootloader) version-misc: PVT SHIP S-ON

(bootloader) serialno: FA446WM02874

(bootloader) imei: 352628060329457

(bootloader) imei2: Not Support

(bootloader) meid: 00000000000000

(bootloader) product: m8_ul

(bootloader) platform: hTCBmsm8974

(bootloader) modelid: 0P6B13000

(bootloader) cidnum: T-MOB010

(bootloader) battery-status: good

(bootloader) battery-voltage: 0mV

(bootloader) partition-layout: Generic

(bootloader) security: on

(bootloader) build-mode: SHIP

(bootloader) boot-mode: FASTBOOT

(bootloader) commitno-bootloader: 6e0f5a3d

(bootloader) hbootpreupdate: 11

(bootloader) gencheckpt: 0

all: Done!

finished. total time: 0.044s

LOG: D:\All Android Devices\T Mobile HTC One M8>fastboot flash flash TMOUS-M8-1.12.53

1.19.recovery.img

sending 'flash' (24576 KB)...

OKAY [ 1.691s]

writing 'flash'...

(bootloader) signature checking...

FAILED (remote: signature verify fail)

finished. total time: 2.953s

D:\All Android Devices\T Mobile HTC One M8>fastboot flash flash philz_touch_6.48

.4-m8.img

sending 'flash' (14436 KB)...

OKAY [ 1.467s]

writing 'flash'...

(bootloader) signature checking...

FAILED (remote: signature verify fail)

finished. total time: 2.293s

D:\All Android Devices\T Mobile HTC One M8>fastboot flash flash T_Mo_1.57.531.7_

recovery.img

sending 'flash' (24576 KB)...

OKAY [ 1.688s]

writing 'flash'...

(bootloader) signature checking...

FAILED (remote: signature verify fail)

finished. total time: 2.753s

D:\All Android Devices\T Mobile HTC One M8>fastboot oem lock

...

(bootloader) [PGFS] partition_update_pgfs: pg1fs_security

(bootloader) Lock successfully...

(bootloader) deinit_lcd

(bootloader) mipi display off

(bootloader) mdp_clock_off

(bootloader) turn off fd8c2308 failed 1 times. Try again...

(bootloader) disable_mmss_clk done

(bootloader) pll1_disable done

(bootloader) TZ_HTC_SVC_DISABLE ret = 536739196 (0x1FFDFD7C)

(bootloader) [CRITICAL] SPMI write command failure: cmd_id =

0, error

(bootloader) = 4

(bootloader) [CRITICAL] SPMI write command failure: cmd_id =

0, error

(bootloader) = 4

(bootloader) [INFO] Rebooting device

FAILED (status read failed (Too many links))

finished. total time: 1.132s