In the context of the SP Flash Tool , errors involving "MMC" (MultiMediaCard/eMMC) typically indicate a communication failure or a physical hardware issue with the device's internal storage. These errors often appear as S_DA_SDMMC_WRITE_FAILED (3149) S_DA_EMMC_FLASH_NOT_FOUND (3144) Common MMC-Related Errors STATUS_MMC_ERR / S_DA_SDMMC_WRITE_FAILED (3149)
Try a different USB cable and a high-speed USB port (directly on the motherboard, not a hub). sp flash tool status mmc error
Switch to a different USB port on your PC (preferably a rear port if using a desktop). Try a different PC if the error persists. In the context of the SP Flash Tool
Battery and Connection State: Ensure the phone is completely switched off with a well-charged battery before connecting it. Try a different PC if the error persists
Goal: Send the flash command before the phone’s faulty preloader locks the eMMC.