Write Imei To - Target Failed

🔹 Is your phone in META Mode (not just powered on)? 👉 To enter META: Power off → Hold Vol Down → Insert USB cable → Release when tool detects.

The host tool successfully connected to the target’s download agent (DA) but failed to commit the IMEI value to the non-volatile storage region (typically NVRAM sector 0x05 for IMEI1). write imei to target failed

This error typically occurs when using engineering tools (like Maui META, SPD Upgrade Tool, or QPST) to restore or repair a device's IMEI number. It indicates the software cannot write the new IMEI to the phone’s NVRAM (Non-Volatile Random Access Memory) or modem partition. 🔹 Is your phone in META Mode (not just powered on)

| Cause | Diagnostic | Solution | |-------|------------|----------| | | Read NVRAM first – if returns all zeros or 0xFF , sector is locked. | Send NVRAM_UNLOCK command via AT+EGMR=1,7,"" | | Checksum Error | Tool log shows CRC mismatch after write. | Recalculate checksum using target’s XOR routine. | | Secure Boot | Device shows BROM ERROR: S_BROM_CMD_STARTCMD_FAIL . | Use authenticated DA file from firmware bundle. | | Partial Write | IMEI appears written but reverts after reboot. | Unmount nvdata partition before write: umount /nvdata | This error typically occurs when using engineering tools

🔹 Are you using Windows 10/11? 👉 Yes → Disable Driver Signature Enforcement and reinstall MTK/USB drivers. 👉 No → Skip to Step 2.

Trying to restore IMEI on my [Phone Model] using Maui META but keep getting "Write IMEI to Target Failed" at 99%.