Modern MT6877 devices employ a secure boot mechanism. Standard flashing attempts will trigger authentication errors (e.g., Status Sec Auth File Needed ). You must use an open-source (such as MCT MTK Bypass) to temporarily disable this security layer before opening the flash utility. 4. Stock Firmware (Scatter-based)
In the SP Flash Tool, click on the button next to the Scatter-loading File field. mt6877 flash tool