Example (12-digit core: 49015420323751)
Digits: 4 9 0 1 5 4 2 0 3 2 3 7 5 1
Double every second from right (excluding last):
(4, 18, 0, 2, 5, 8, 2, 0, 3, 4, 3, 14, 5, 2)
Reduce >9: 4, 9, 0, 2, 5, 8, 2, 0, 3, 4, 3, 5, 5, 2
Sum = 52 → 52×9=468 → last digit = 8 ✅
Write IMEI R1.5.6.1 is a specific version of the Spreadtrum (SPD) WriteIMEI utility used to restore or repair International Mobile Equipment Identity (IMEI) numbers on devices using Spreadtrum chipsets. Key Features Restoration: Primarily used to restore a lost or null IMEI after flashing new firmware or performing a factory reset. Multi-Address Writing:
Beyond IMEI, it can often write other device identifiers like Bluetooth addresses, Wi-Fi MAC addresses, and serial numbers Device Compatibility:
Optimized for Spreadtrum-based smartphones and feature phones (e.g., those with SC6531 or similar chipsets). Prerequisites for Use write imei r1.5.6.1
To use this tool effectively, you generally need the following: SPD Drivers: Correct Spreadtrum USB
installed on your PC to ensure the device is recognized in "Diag" or "Calibration" mode. USB Debugging:
For some Android-based SPD devices, enabling USB debugging in Developer Options may be required. Original IMEI: Example (12-digit core: 49015420323751) Digits: 4 9 0
You must have the original 15-digit IMEI number, typically found on the device's back panel , under the battery, or on the original packaging. General Usage Steps Launch Tool: writeimei.exe on your computer. Select Port:
Connect your device to the PC and select the active COM port in the tool's settings. Mode Selection:
Usually, "Normal Mode" or "Calibration Mode" is selected depending on the device state. Enter IMEI: Input the 15-digit into the provided fields. To execute the command successfully, you need: |
Click the "Write" or "Start" button. A "Pass" message indicates a successful write. Important Legal Note:
Changing an IMEI to a number other than the one originally assigned to the device is illegal in many jurisdictions. This tool should only be used for legitimate repair and restoration If you'd like, I can help you: Find the correct for your specific device step-by-step troubleshooting guide if the tool isn't detecting your phone Explain how to find your original IMEI if the sticker is missing Let me know which of phone you are working with! What Is An IMEI Number & How Can I Find Mine? - T-Mobile
To execute the command successfully, you need:
| Component | Specification | |-----------|---------------| | PC OS | Windows 7, 8.1, or 10 (32/64-bit – disable driver signature enforcement) | | Software | SN Write Tool v1.5.6.1 or Maui META 9.x with custom script | | Drivers | MediaTek USB VCOM drivers (or CDC drivers for Android) | | Hardware | USB cable (data sync capable) + target device with MTK CPU (e.g., MT6572, MT6580, MT6737) | | IMEI Source | Original IMEI1 and IMEI2 (for dual SIM) – printed on device casing |