To understand the fix, you must understand the terminology:

In simple terms: The SP Flash Tool is trying to access the device's memory using an old method that your phone’s security firmware is blocking.


Since the error explicitly mentions "patched", the most effective fix involves using a compatible patched DA or modifying the flashing process.

When using SP Flash Tool (SmartPhone Flash Tool) to flash firmware on MediaTek-based Android devices, users may encounter the error:

STATUS_EXT_RAM_EXCEPTION_PATCHED (0xC0050005)

This error typically occurs during the DA (Download Agent) initialization phase, right after the tool sends the preloader or DA to the device's RAM. The error indicates that the external RAM (DRAM) on the device failed to initialize properly, and the flash tool’s exception handler has “patched” or bypassed the issue — but the process cannot continue safely.