At first, you have to download Phoenix software on your PC then install it generally.
After, download the firmware of your device from the official Nokia page.
To your hard drive, you need to save firmware in this way go to the Files – Nokia – Phoenix – Products in a format.
By the Nokia USB DriverCable connect your phone to Computer and then start this software.
From the top button or bar, you have to select “NO CONNECTION”
From the menu now click on File and then start or open Product.
Chose the product here of your device, try to search on the internet connection with your smartphone name for the product.
Don’t forget to back up of your important data before flashing. Because while flashing it will be deleted.
After completing the product version, then you can do more what you want such as tuning, flashing, refurbishing, firmware upgrade or others. You have to choose just your option and start running it.
Finally, your device will be restored after completing the update successfully.