These are the instructions to flash stock firmware on Qualcomm devices using Qualcomm SW Downloader Application on Windows Computer.
Requirements: The following tutorial will only work on Qualcomm Feature Phone, Smartphone and Tablets. It will not work on the devices which are having other chipsets.
Step 1: Download and install Qualcomm USB driver on your Computer. If in case you have already installed the Driver on your computer, then SKIP this step.
Step 2: Download the Stock Firmware of your Mediatek Device and extract it on the computer (you can find Stock Firmware on FirmwareFile or through Google).
Step 3: Download and extract Qualcomm SW Downloader on your computer. After, extracting you will be able to see the following files:
Step 4: Now Open SWDownloader.exe. Once it is launched, you will be able to see the following window:
Step 5: Now, Click on the Browse button and locate the firmware folder (which you have already downloaded on your computer).
Step 6: Now, Click on the Chipset and select the platform of your device (platform number is written on the device box or on the back panel of your device).
Step 7: Now, If you want to restore the NAV or EFS file then Click on the Settings button or else SKIP this step.
Step 8: Now, Power Off your device.
Step 9: Now, Connect the device to the computer using the USB Cable.
Step 10: Now, Click on the Start Download button to begin the flashing process.
Step 11: Once Flashing process is completed you will be able to see the success message on the flash tool.
Step 12: Now, disconnect your device from the computer and restart your device.
[*] Compatible Driver: Qualcomm SW Downloader may only works with the compatible driver which we have shared above. If you are using any other Qualcomm driver then it may not work for you.
[*] Caution: There are few options available in the Settings Window, which includes Erase Data. If by mistake you tick this option then during the Flashing process, it will erase the flash data from your device.
[*] How to Flash IMEI? If you want to Flash IMEI on your Qualcomm smartphone, Tablet or Feature Phone then use SN Writer Tool to Write the IMEI. You can Find the SN Writer Tool with the Flash Tool.
[*] Credits: Qualcomm SW Downloader is created and distributed by WaterWorld D12. So, full credits goes to them for sharing the application for free.