The phone should instantly switch ports in your Device Manager. Method 4: Using Professional Service Tools
Before attempting any of the methods below, ensure you have the following: enter diag mode spd
Entering Diag Mode on a Spreadtrum device is the first step toward advanced mobile repair. While the method works for 80% of devices, knowing the Dialer Codes and ADB commands ensures you can handle any situation. The phone should instantly switch ports in your
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 the manual methods fail, professional "dongles" or
While holding the button, connect the phone to your PC via USB.
In this guide, we’ll break down exactly what Diag Mode is and the various methods to trigger it on almost any SPD-based device. What is SPD Diag Mode?