How to flash SPD using upgradeDownload/Research Download tool

Note
Follow the instructions on how to flash the device carefully below
I will not take responsibility on whatever may happen to your device.
Flash at your own risk..
Make sure you are downloading the exact ROM of the device you want to flash because
 flashing a wrong firmware, will make the device completely dead
(can’t power on, can’t charge and will not be detected by a computer)
Download an install SPD drivers from here
Download the latest version of Research Download or UpgradeDownload tool from here
Extract and Launch Research Download/UpgradeDownload Tool
Click on load icon
Navigate to the folder containing the firmware
Select the pac file in the firmware folder
Wait for it to load in Research Download/UpgradeDownload tool
Click Play/Start button
Now connect the device to PC while holding volume down key
(Some new devices requires holding volume up key)
Wait for flashing process to complete
When you see Passed! Then note that the flashing or upgrading process is complete
Disconnect and reboot device

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