The default DA in SP Flash Tool often fails for this error. You need a or the exact DA extracted from the stock ROM.
[DRAM] Channel A calibration fail [EXT_RAM] Exception at 0x40002000
Many advanced users overcome the "Ext RAM Exception" by bypassing the preloader update. sp flash tool error status ext ram exception link
The EMMC or chip responsible for the external RAM on the motherboard is physically damaged, loose, or degraded (often referred to as a "dead eMMC").
Did this error start happening after a , or did the phone suddenly turn off on its own? Share public link The default DA in SP Flash Tool often fails for this error
| Error | Phase | Root Difference | |-------|-------|------------------| | S_DRAM_SETTINGS_FAIL | Preloader DRAM init | DRAM never became ready | | S_EXT_RAM_EXCEPTION | After DA loaded | DRAM works, but code crashes | | S_BROM_CMD_SEND_DA_FAIL | USB/transport | DA not transferred fully | | S_SECURITY_SECURE_USB_DL_DISABLED | Security | DA rejected by boot ROM |
The default MTK_AllInOne_DA.bin is not always sufficient. The SP Flash Tool allows you to load a custom DA file. The EMMC or chip responsible for the external
Your phone’s processor tried to “talk” to its physical RAM chips to load the firmware, but the RAM either failed to respond, responded with garbage data, or was not initialized correctly.
Verify the is exactly for your model and region (e.g., Global vs. China). 2. Check the Preloader The Preloader is responsible for waking up the RAM.