Entering Diagnostic (Diag) mode on SPD (Spreadtrum/Unisoc) devices is typically done to perform service tasks like IMEI repair, unlocking, or firmware fixes. Unlike Qualcomm devices that often use dialer codes, SPD devices usually require a specific sequence involving a PC and a USB cable. How to Enter Diag Mode on SPD Devices
Phone Boots to System: If the phone just turns on normally when you plug it in, your timing is off. Try holding the buttons before plugging in the cable, or try a different button combination (Power + Volume Down). enter diag mode spd
While holding the button, connect the phone to your PC via USB. Try holding the buttons before plugging in the
If you have ADB enabled and the device is rooted, you can force the device into Diag Mode using the command line. Connect your phone to the PC with USB Debugging enabled. Open a Command Prompt (CMD) and type:adb shellsu Connect your phone to the PC with USB Debugging enabled