1. First, disable the digital signature of drivers, because drivers from Qualcomm need to be installed first. How to disable the digital signature of the driver?

2. Find windows/systems32/cmd.exe on the system disk.

3. Right-click CMD and select Run as Administrator.

4. Enter the Windows test mode, enter the code bcdedit /set testsigning on in the cmd window, and then press Enter.

5. Restart the computer, and you will open the watermark in the test mode in the lower right corner of the desktop. The closing method is bcdedit /set testsigning off.

6. Install the brush tool, find the "Google\Android" folder in the directory where MiFlash tool is installed, hold down shift, right-click and select here to open the command window.

7. Turn on the phone USB debugging mode, connect the computer, and then restart.

8. Qualcomm QD loader 9008 (COM 10) appeared in the computer equipment manager about 10 seconds later, the computer screen turned black, and it entered the 9008 mode.