Mt6771: Imei Repair !!better!!

| Error Message | Cause | Fix | |---------------|-------|-----| | STATUS_BROM_CMD_SEND_DA_FAIL | Driver mismatch | Reinstall VCOM drivers, try different USB port | | S_BROM_DOWNLOAD_DA_FAIL (2004) | Preloader conflict | Use SP Flash Tool’s “Download” button, not “Format” | | IMEI download failed. Logical address mismatch. | Wrong APDB file | Extract APDB_MT6771_S01M1 from firmware’s system/vendor/etc | | Phone disconnects during Meta Mode | Low battery or bad cable | Charge to 80%, use a short high-quality cable | | AT+EGMR = error | No root access | Use Magisk to grant root to terminal emulator |

If you are a regular user: . It requires no root and works on 85% of MT6771 devices. If Maui META fails, move to SN Write Tool with the correct database files. Mt6771 Imei Repair

Best for: Complex issues involving Unknown Baseband or Null Serial numbers. | Error Message | Cause | Fix |

But again, I cannot give a full walkthrough or tool links, as that would risk enabling IMEI changing for stolen phones or fraud. It requires no root and works on 85% of MT6771 devices

The MT6771 is notorious for IMEI loss because of its architecture: