The tool requires the installation of MTK USB VCOM Drivers and often the LibUSB Filter Driver to establish a connection in "Brom" or "Preloader" mode.
Always ensure you download such tools from reputable community forums or official GSM hosting sites to avoid malware or corrupted files. Vivo Y69 & Xiaomi Unlock Tool Update | PDF - Scribd
The version 1.4 series is particularly effective for older and mid-range MediaTek Vivo models, including: Y12, Y15, Y17, Y19, Y20 (MTK variants). V-Series: V11, V15, and earlier MTK-based V-series models. S-Series: S1 (MTK variant). Usage & Safety