Newer chipsets like the MT6781 typically require v5.x or v6.x to handle modern partition tables.
Because modern MTK chips are locked, you frequently need a "Libusb" filter and an MTK Auth Bypass utility to "blind" the security check before flashing. Prerequisites for MT6781 Flashing
(connecting the device without holding any hardware buttons) rather than the standard BROM mode (Vol Up/Down + Power). Authentication Bypass
Call to action: Comment with your device model and current issue for help choosing the right ROM and step-by-step guidance.
: Full flash access even on bricked or locked devices.