If a device loses its network signal or displays an "Invalid IMEI" error, the nvram or nvdata sectors are likely corrupted. The scatter file allows a developer to flash or restore a clean backup image directly into the NV blocks to recover wireless cell service. Step-by-Step Guide to Flashing with MT6769 Scatter
The MT6769’s PMIC was already at 85°C. The scatter file she’d used had a wrong region address for the preloader—pointing not to flash, but to a reserved power management register. Instead of writing to eMMC, the tool was shorting a control line, forcing the PMIC into an overcurrent loop. mt6769 scatter file hot