. This mode is commonly used by developers or technicians to perform deep-level tasks like IMEI repair, flashing firmware, or hardware testing. Common Methods to Enter Diag Mode
If you see this, the device is successfully in Diag Mode and ready for tools like , Infinity CM2 , or Miracle Box to perform repairs.
Before attempting to enter Diag Mode, ensure you have the following:
The PC should detect the device, and the software will send a command to switch it into Diagnostic Mode Device Manager enter diag mode spd
While holding the button, plug the USB cable into the device.
Your computer cannot interpret the diagnostic connection without proper low-level architecture filters. Download and run the DriverSetup.exe packaged inside the SPD Driver Package .
Before attempting any hardware connection method, you must prepare your environment: Before attempting to enter Diag Mode, ensure you
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.
: Ensure you have the latest SPD/Unisoc USB Drivers installed. Without these, the "Diag" port will appear as an "Unknown Device" in Windows.
Select your device's specific CPU architecture or phone model from the dropdown menu. Click the or Enter DAG button on the interface. Before attempting any hardware connection method, you must
The most direct way to trigger the interface uses built-in bootloader triggers.
Select the or "Read Info" option in the software.
: Fixes "Invalid IMEI" or "Null IMEI" errors caused by flashing bad firmware.