In SP Flash Tool → Format → Format whole flash (risky, but sometimes fixes partition errors).
You are clicking "Download," the red progress bar fills, then the purple bar, but suddenly— BAM . A red error message pops up: STATUS_MMC_ERROR or S_BROM_DOWNLOAD_MMC_RESULT_FAIL . The process halts, and your phone remains bricked. sp flash tool status mmc error
Error at 2% but sometimes passes. Root cause: Cracked solder ball under eMMC. Solution: Reballed eMMC with leaded solder; error eliminated. In SP Flash Tool → Format → Format
The "SP Flash Tool Status MMC Error" (often appearing as BROM ERROR: S_DA_SDMMC_WRITE_FAILED (3149) " the red progress bar fills