#Qualcomm HS USB QDLoader 9008 COM4 lg how to
#Qualcomm HS USB QDLoader 9008 COM4 lg zip file
#Qualcomm HS USB QDLoader 9008 COM4 lg android

Hold the SHIFT key on the keyboard and right-click on an empty space inside the folder. On Windows: Open the ‘platform-tools’ folder.Launch the command-line tool in this same folder.The extracted ‘platform-tools’ folder will contain ADB and other binaries you’d need.

#Qualcomm HS USB QDLoader 9008 COM4 lg zip file

Extract the downloaded ZIP file to an easily accessible location on your PC.

#Qualcomm HS USB QDLoader 9008 COM4 lg android

Download the latest Android SDK tools package from here.If it is in a bootloop or cannot enter the OS, move to the second method. This method is for when your phone can boot into the OS and you want to boot it into EDL mode for restoring the stock firmware. To gain access to EDL mode on your phone, follow the instructions below. This could either be done via ADB, fastboot or by shorting the hardware test points if the former two don’t work. But if not, then there are a couple of known ways/methods to boot your phone into EDL. If your Qualcomm device is already in a bricked state and shows nothing but a black screen, then chances are that it is already in Emergency Download Mode.

#Qualcomm HS USB QDLoader 9008 COM4 lg how to

How to Enter EDL Mode on Qualcomm Android Devices

Learn how to flash firmware files on Qualcomm Android devices using QPST Tool.

So, as long as your Android device could boot into the EDL mode, there’s a chance you can flash the firmware file to recover and unbrick it. During this process, EDL implements the Firehose/Sahara protocol and acts as a Secondary Bootloader to accept commands for flashing.

The figure on the right shows the boot process when EDL mode is executed.

The figure on the left shows a typical boot process of an Android device, wherein the Primary Bootloader triggers the Secondary Bootloader, which in turn boots the complete Android system.

To have a better understanding, please take a look at the figures below. Unlike Fastboot, Download, and Recovery modes on Android, which reside in the Secondary Bootloader (SBL), PBL resides within the ROM and so it could not be corrupted due to software errors (again, like a wrong flash). EDL itself is a part of the Primary Bootloader (PBL) on Qualcomm Devices. That’s exactly when you’d need to use EDL mode. We often like to refer to this device state as a “Hard-brick”. And thus, there would be no chance of flashing the firmware to revive/unbrick the device.

Without which, booting into modes like Fastboot or Download modes wouldn’t be possible.

Some times, flashing the wrong file can also potentially corrupt the Android bootloader itself. Generally if the device’s software is corrupted due to a wrong flash or any other software issue, it could be revived by flashing the firmware through Fastboot and Download modes. The OEM flash tools can only communicate with a device and flash it through the said modes. If you’re familiar with flashing firmware or custom binaries (like TWRP, root, etc), you’d know that it is required to boot the Android device into specific boot modes like Fastboot or Download Modes. Why and when would you need to use EDL Mode?