"Phone died during system update. No power, no charging LED, no PC detection except for 5 seconds then disconnect."
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