Uninstall all existing MediaTek, VCOM, and Preloader drivers using a tool like Device Cleanup Tool or Windows Device Manager. Restart your computer.
For newer MTK chipsets (e.g., Helio or Dimensity series), ensure you are using the v6.x branch rather than the older v5.x branch. 3. Reinstall MediaTek USB VCOM Drivers
If your device features a locked bootloader with SLA/DAA (Serial Link Authentication / Download Agent Authentication), the BROM will actively block the SP Flash Tool from initializing the RAM without an authentication file ( .auth ).
Ensure the firmware package you downloaded perfectly matches your device’s model number, region, and hardware revision. sp flash tool error status ext ram exception
Here is a detailed breakdown of why this happens and how to resolve it.
Did this error happen after a , or during a routine upgrade ?
Open the dropdown menu in SP Flash Tool (located just below the scatter file path). Switch from to Firmware Upgrade . Uninstall all existing MediaTek, VCOM, and Preloader drivers
: If you previously flashed the wrong firmware, use a tool like MTKClient to erase userdata and metadata partitions before attempting a fresh flash.
: Using a ROM intended for a different model or even a slightly different sub-variant (e.g., flashing firmware for a 3GB RAM model onto a 2GB RAM model). Wrong Download Agent (DA)
Faulty data transmission over USB can corrupt the RAM initialization commands. Disconnect your device from the computer. Here is a detailed breakdown of why this
Find a DA file specifically for your chipset (e.g., DA_6765_6785.bin ).
SP Flash Tool has a hidden RAM test function. Disabling aggressive RAM checks can bypass the exception.
Before you begin the flashing process, run through this checklist to minimize risk: