If you do not have an official authorized account to flash your device, community-developed tools are often used to "bypass" the MT6781's security:

: Unless you are fixing a completely "dead" (hard-bricked) device,

This text-based map (e.g., MT6781_Android_scatter.txt ) defines the memory structure of your specific device model.

Disclaimer: Modifying firmware carries risks. Always ensure you have a valid backup of your NVRAM and userdata before attempting advanced flashing procedures on MT6781 devices.

: Many modern MTK chips, including the MT6781, use secure boot. Tools like TFM Tool Pro