MediaTek phones have a low-level boot ROM (BROM) that is active before the main OS boots. The V30 Exclusive tool forces the phone into (often via VOL UP + VOL DOWN + USB or by shorting specific test points on the motherboard).
: Supports a wide range of MTK-based devices, including smartphones and feature phones (keypad mobiles). mtk imei v30 exclusive
If you need to restore your original IMEI, use a trusted repair shop with a legitimate dongle. The $5 you save by using a cracked tool might cost you a $500 phone. MediaTek phones have a low-level boot ROM (BROM)