Contents • • • • • • • Unbricking Qualcomm Android Devices Step One: Analyzing the possible cause of the brick In newer Qualcomm devices firmware (not the HLOS part, but NON-Hlos, SBL1, TZ, HYP, RPM, and Aboot), especially ARMv8-A, Qualcomm diminished the famous “Qualcomm HS-USB Diagnostics 9006”, and introduced two types of “Qualcomm HS-USB QDLoader 9008”. So, before attempting to unbrick your Qualcomm device you need to figure out which 9008 mode your phone is in. This now brings us to Step Two: Preparing your Computer • Disconnect your PC’s internet connections and unplug your mobile device from the computer. • Download and install the latest.net Framework on your Computer.

• Uninstall all mobile related drivers, as well as any Qualcomm driver (if any). Uninstall from Device Manager first, then Program Manager. • Alternatively, you can use REVOUninstaller to uninstall all driver related software, then use Device Remover to remove all device drivers. • Now, run Command Prompt as Administrator and issue the follow commands followed by Enter button bcdedit -set loadoptions DISABLE_INTEGRITY_CHECKS bcdedit -set TESTSIGNING ON • Reboot you computer, and it should now boot into test mode as shown in the screenshot below. (bottom-right of your screen).

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• Download, extract to an empty folder, then open the folder according to your Windows type (x64 or x86) and double click dpinst64.exe or dpinst32.exe (depending on your Windows installation) to install the Qualcomm driver. • Now connect your phone to the computer. It should now be detected as “ Qualcomm HS-USB QDLoader 9008” and the driver version 2.0.8.7 (you can check in “Device Manager”).

Step Three: Possible cause of brick (brick type) If you were just messing with system image, boot image, system’s framework or other things that does not relate to Qualcomm’s core files (modem-NON-HLOS.bin, aboot-emmc_appsboot.mbn, sbl1, hyp, tz, rpm partition, for example installing sound patch, etc, your device will enter the new 9008 mode, which is a combination of the old “ Qualcomm HS-USB Diagnostics 9006” and “ Qualcomm HS-USB QDLoader 9008”. Symptoms of this brick mode include: • The LED charging indicator near the phone speaker will display red. • Your phone will vibrate endlessly, and this vibration will end only if you disconnect the phone from your PC and remove the battery. If Device Manager is launched, you’ll see “ Qualcomm HS-USB QDLoader 9008” under PORTS (COM & LPT) or “ QHUSB_BULK” under Other devices, and “ Qualcomm MMC Storage USB Device” under Disk drives. See screenshot below. However, if your Mobile’s Qualcomm’s partition is messed up while playing around with NON-HLOS.bin, emmc_appsboot.mbn, sbl1.mbn, hyp.mbn, tz.mbn, rpm.mbn, or by other means, messing the whole Qualcomm’s eMMC partition, your device will most likely go into the OLD “Qualcomm HS-USB QDLoader 9008” mode.

Symptons: • The phone charging indicator would not light if you connect your mobile to Computer. In Device Manager only “ Qualcomm HS-USB QDLoader 9008” will be listed in PORTS (COM & LPT) or “ QHUSB_BULK” in Other devices, but no “ Qualcomm MMC Storage USB Device” in Disk drives.