: Ensure the drivers are correctly installed. Check Windows Device Manager for any "QUSB_BULK" errors.
While specific interfaces vary between versions, the general procedure for these Qualcomm tools is as follows: Download MMT Qualcomm User Lock zip
Tools like this are unofficial third-party software. To protect your PC and mobile device: : Ensure the drivers are correctly installed
Click and wait for the "Operation Finished" or "Done" message. Download MMT Qualcomm User Lock zip
Connect the phone to your PC while holding the buttons (the screen will remain black if successful).
: If the tool requires a specific model, navigate to the Qualcomm tab and select your brand (e.g., Vivo, Oppo, Realme). Boot into EDL Mode : Power off your phone completely.
Alternatively, some tools offer a "Fastboot to EDL" button if your phone is in Fastboot mode.