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Hold the device's specific "Boot Key" (often or both Volume buttons) and connect the USB cable.
Open a Command Prompt (CMD) and type: adb shell su setprop sys.usb.config diag,adb
While less common for SPD than for other chipsets, some specific manufacturers use dialer codes to trigger internal menus:
Enter diag mode SPD? [YES] [NO]
Hold the device's specific "Boot Key" (often or both Volume buttons) and connect the USB cable.
Open a Command Prompt (CMD) and type: adb shell su setprop sys.usb.config diag,adb
While less common for SPD than for other chipsets, some specific manufacturers use dialer codes to trigger internal menus:
Enter diag mode SPD? [YES] [NO]