The following solutions are presented in order from the most common and simplest to the most complex and specialized. It is highly recommended to try them in sequence.
When connecting the phone, it should briefly appear under "Ports (COM & LPT)" as MediaTek PreLoader USB VCOM . 3. Use the Correct "Download" Mode
If you previously flashed a bad Preloader, your phone is in a “preloader loop” – it tries to boot, crashes, restarts, infinitely. This causes the EXT_RAM_EXCEPTION on every attempt.
In SP Flash Tool, go to and set the connection type to UART . Select the COM port identified by the bypass tool.
Always source firmware from reputable, verified databases. 2. Change or Update the Download Agent (DA)
When you trigger a flashing process, the tool loads a small piece of code called the Download Agent (DA) into the phone's internal SRAM. The DA then initializes and tests the external DRAM to prepare it for receiving the large partition images (like system.img or boot.img ). If the SP Flash Tool cannot communicate with, initialize, or write to the DRAM, it halts the operation and throws the hardware exception error.
Download a specific to your MediaTek chipset or phone model. Open SP Flash Tool .
If you’ve verified firmware, DA, drivers, cable, ports, and tool versions and still get STATUS_EXT_RAM_EXCEPTION_LINK, suspect hardware: