However, for most users, the UMT META mode repair described above is permanent across reboots.
| Error Message | Cause | Solution | | :--- | :--- | :--- | | | Driver not installed or Windows signature enforcement active | Disable Driver Signature Enforcement (Windows Advanced Boot). Reinstall drivers. | | "S_BROM_CMD_START_FAIL" | Wrong USB cable or USB port | Use USB 2.0 port. Change cable (avoid charge-only cables). | | "DA Error - Status_Ext_Ram_Exception" | Phone in Brom mode instead of META | Battery disconnect? Hold buttons longer. Try pressing Vol Down only. | | "Security Check Failed" | Phone has a locked bootloader or anti-rollback | Flash full stock firmware (same version) via SP Flash Tool first. Then retry. | | "IMEI written but shows 0 after reboot" | NVRAM write protected or partition damaged | Use UMT's "Format NVRAM" option FIRST, then repair. Warning: This erases Wi-Fi MAC and BT address. | realme 3 imei repair umt