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SP Flash Tool should detect the device instantly, and a yellow loading bar will appear. If you see a red bar followed by a purple/yellow bar, it is working.

In simple terms, an MT6735 flash file (often packaged as a PAC , TWRP , or SP Flash Tool folder) contains the raw operating system data required to rewrite the phone’s internal memory. This file is the "surgery" for a bricked device.

The initial code that boots the device and allows it to communicate with a computer via USB for repair.