You need to have the NCK box or dongle hardware. Diagnostic (Diag) Mode enables you write IMEI to your device. YouTube · Hovatek
Entering Diagnostic (Diag) mode on 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 enter diag mode spd