Monday, April 18, 2016

RUU Error 155 despite relocked bootloader

Phone specs:
Code:

RELOCKED
M8_UL PVT SHIP S-OFF
CID-11111111
HBOOT-3.16.0.0000
RADIO-1.23.213311491.05G
OpenDSP-v48.2.2-00564-M8974_FO.1211
OS-4.20.531.4 (1.54.401.5)
eMMC-boot 2048MB


So I'm trying to update my One M8, and I think I messed up pretty bad. I tried running the RUU updater for my T-Mobile variant (found on HTC's ROM Download page), but got the infamous "error 155." However, my bootloader is re-locked. Therefore, according to all the forum posts I could find, I shouldn't be getting that error. I've run a few commands since then, including fastboot oem writecid 11111111 and fastboot erase cache. Somehow, I've managed to get to the point where my phone won't even boot into recovery, it just gets stuck at the "Entering recovery..." screen. However, while stuck on this screen, the phone does respond to ADB commands. I can get root shell access, but I'm not sure what to do with it.

I've tried flashing TWRP 3.0.0.0 to no avail. I've tried running fastboot boot <twrp filename here>, also to no avail. I'm pretty much stuck with a phone that only boots into fastboot, and a weird purgatory-recovery where I can achieve shell access. The RUU file fails to update no matter what I do.

Is there a way I can fix this, or have I completely bricked my phone?

Thank you for your time.


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