These are the instructions to use GNQC Download Tool to flash stock firmware on Qualcomm Based Android Smartphones and Tablets.
Requirements: Your Android device should have at least 20-30 percent of battery to perform the Flashing Process.
Congratulations, Now your Android Device is successfully running the Stock ROM you have Downloaded.
[*] Unable to Choose Firmware Path? If you are not able to click on Choose Path Button in Step#7 then it means you have not connected your Qualcomm Device to the computer. Try to Connect it after installing the USB Driver and also make sure your device is Power Off.
[*] Take Backup: Take a complete backup of your device before using the GNQC Tool because, during the flashing process, your data will be removed.
[*] Qualcomm USB Driver: We have shared the original Qualcomm USB Driver with the tool. You can find the driver after extracting the tool on your computer.
[*] Credits: GNQC DownLoad Tool is created and distributed by Qualcomm, Inc. So, full credit goes to them for sharing the tool for free.