Enter Diag Mode Spd ((install)) Here

Navigate using the volume joystick (usually up/down cycles through tests). Look for:

Many legacy and budget Spreadtrum devices allow entry into a temporary diagnostic mode straight from a powered-down state. Turn the smartphone or tablet completely . enter diag mode spd

Open a Command Prompt (CMD) and type: adb shell su setprop sys.usb.config diag,adb Navigate using the volume joystick (usually up/down cycles

Select your targeted phone platform generation from the dropdown configuration profiles. enter diag mode spd