So, I'm really hoping that I haven't bricked my phone and that someone can help me figure out how to fix this.
I can't remember exactly the steps I took to mess it up so spectacularly, but they included trying to flash to the M2 snapshot of CyanogenMod 11 from a ViperOne ROM, relocking the bootloader, attempting to restore to a stock RUU (and failing because I accidentally downloaded an unsigned version), reUNlocking the bootloader, and formatting via TWRP.
Fastboot appears to recognise that the phone is plugged in (it reads
FASTBOOT USB on the bootloader screen), and Windows 8 sees the device in Device Manager. However, when I attempt to do anything with ADB it returns
error: device not found, so I can't use rebootRUU or push files to the /sdcard/ directory, and I have no ROMs to flash.
The bootloader screen reads:
*** TAMPERED *** *** RELOCKED *** *** Security Warning *** M7_UL PVT SHIP S-ON RH HBOOT-1.54.0000 RADIO-4A.17.3250.14 OpenDSP-v31.120.274.0617 OS-2.24.841.1 eMMC-boot 2048MB Jun 21 2013,23:03:15.0 FASTBOOT USB
It also appears that I am able to use FastBoot to lock and unlock the bootloader using the unlock bin file I created earlier today, yet
fastboot devices returns nothing and
fastboot reboot returns
< waiting for devices >.
Is there anything I can do short of using a USB-OTG cable to sideload a custom ROM?
I would be inconceivably grateful for any help which gets me closer to getting my phone working again. Thanks in advance!
EDIT 1: So, after rebooting a couple of times,
*** Security Warning *** is no longer there and
fastboot devices now returns my serial number. However,
adb devices still returns nothing. Any idea what's going on?