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Make sure you are flashing the right firmware for your smartphone. This will help you avoid downloading the wrong firmware.
If your smartphone is a Mediatek Socs or you downloaded a MediaTek Firmware, then you need an SP Flash Tool to flash and Vcom Drivers
If your smartphone is Qualcomm Snapdragon Socs, or you downloaded a Qualcomm Snapdragon firmware, you will need Qualcomm Flash Image Loader to flash Qualcomm Smartphone.
If you are flashing firmware for Spreadtrum smartphone, you are going to need Spreadtrum Upgrade Downgrade Tool. SpreadTrum firmware comes in.PAC format, Follow here to learn how to flash firmware for Spreadtrum Smartphone.
There are other smartphones, It can be Qualcomm Snapdragon, MediaTek, Intel, Spreadtrum or other Android OS.
We might not be able to cover them in our post, you can learn how to flash the firmware from here.
If you are downloading a rooting tool or app or even software. There are different rooting methods, we have to root via apps, and rooting via pc. Click Here to Know More