[One (M7) Q&A, Help & Troubleshooting] juicylife:
I achieved S-OFF with rumrunner on m HTC 802d (Dual-Sim) variant. Reading around threads I realized that its ok to flash anything with S-OFF so decided to flash RUU Zip M7 HTC Google Edition_3.06.1700.10. However suddenly the phone switched off and I had an error on the fastboot screen. I tried to issue the command again but it did not work. The phone's display did not start no matter what I tried. Prior to flashing I had set supercid 11111111 on my device.

Things I tried:

1. Holding power button for 90 seconds or more, restarting. It only shows connectivity in fastboot. However when I issue command fastboot devices, I get this:

???????????? fastboot

2. Trying to unlock boot loader with fastboot flash unlocktoken Unlock_code.bin. Result:

C:\fastboot>fastboot flash unlocktoken Unlock_code.bin

sending 'unlocktoken' (0 KB)...

OKAY [ 0.002s]

writing 'unlocktoken'...

FAILED (remote: unlock token check failed)

finished. total time: 0.007s

3. I tried to generate a new key and unlock it again at HTCDev but I get an error with the new identifier.

4. Tried flashing custom recovery. Result:

C:\fastboot>fastboot flash recovery recovery.img

sending 'recovery' (16383 KB)...

OKAY [ 0.828s]

writing 'recovery'...

FAILED (remote: not allowed)

finished. total time: 0.830s

5. Tried to re-run the RUU mode and flash, but the phone restarts and gets struck without returning. Output:

C:\fastboot>fastboot oem rebootRUU

...

(bootloader) Start Verify: -1

OKAY [ 0.035s]

finished. total time: 0.036s

C:\fastboot>fastboot getvar all

< waiting for device >

6. Tried clearing cache: fastboot erase cache. Output:

C:\fastboot>fastboot erase cache

erasing 'cache'...

FAILED (remote: erasing error!)

finished. total time: 0.001s

7. Tried running stock RUU (exe), but it gets struck on "Verifying information on your Android phone..." forever.

8. Tried flashing the zip directly. Result:

C:\fastboot>fastboot flash zip RUU.zip

sending 'zip' (428998 KB)...

OKAY [ 21.698s]

writing 'zip'...

FAILED (remote: not allowed)

finished. total time: 21.701s

9. Issued the lock command

C:\fastboot>fastboot oem lock

...

(bootloader) Device was already locked!

OKAY [ 0.001s]

finished. total time: 0.002s

10. fastboot getvar all commands gives this:

C:\fastboot>fastboot getvar all

(bootloader) version-bootloader: 1.54.0000 <- earlier to attempting the flash this was 2.27.0000

(bootloader) version-baseband: N/A

(bootloader) version-cpld: None

(bootloader) version-microp: None

(bootloader) version-main:

(bootloader) version-misc: UNKNOWN

(bootloader) serialno:

(bootloader) imei: myimeinumber

(bootloader) meid: 00000000000000

(bootloader) product:

(bootloader) platform: HBOOT-8064

(bootloader) modelid: *********

(bootloader) cidnum:

(bootloader) battery-status: good

(bootloader) battery-voltage: 3776mV

(bootloader) partition-layout: Generic

(bootloader) security: off

(bootloader) build-mode: SHIP

(bootloader) boot-mode: UNKNOWN

(bootloader) commitno-bootloader: dirty-94cf81a8fd

(bootloader) hbootpreupdate: 11

(bootloader) gencheckpt: 0

all: Done!

finished. total time: 0.020s

As you can see some fields are blank.

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Please help me! :(