Enter Diag Mode Spd <iOS>

If the manual methods fail, professional "dongles" or software tools are the most reliable way to force a connection. Tools like , Infinity CM2 , or UnlockTool have "Enter Diag" functions. Open your preferred tool and select the SPD/Unisoc tab. Select the correct CPU model (e.g., SC9863A, Tiger T606). Click "Enter Diag" or "Read Info."

If you have ADB enabled and the device is rooted, you can force the port open via terminal commands. Connect the phone to the PC with enabled. enter diag mode spd