STK-L21MDV Dead Boot Repair Without Losing IMEI and OEM (1.0.0.80)

STK-L21MDV Dead Boot Repair Without Losing IMEI and OEM (1.0.0.80)

If your Huawei STK-L21MDV device has no power on dead and no response on the power button press, no problem! You can now easily fix it without losing IMEI or OEM data using a tested and working method. This guide will walk you through the steps using Sigma Box and a special ROM.

Also read :How to Unlock Bootloader on Xiaomi Redmi A1/A2 Without Erasing Data

✅ What You’ll Need:

• STK-L21MDV Dead Boot Repair File (1.0.0.80)
  

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  🔗 Download ROM (Google Drive)

• Sigma Box for loading into Fastboot Mode

• IMAGE Download Software v2.0.0.9 for flashing

Also read :How to Fix WiFi and Bluetooth Issues on Redmi Note 11 Pro 5G (Veux) with QCN File

🔧 Repair Steps:

Step 1: Load Fastboot Mode via Sigma Box

1. Connect the dead STK-L21MDV to your PC using a USB cable.
2. Open Sigma Software.
3. Use the "Load Fastboot" feature to boot the phone into Fastboot Mode.
4. Wait for the device to be detected.

Step 2: Flash ROM via IMAGE Download Tool

1. Launch IMAGE Download Software v2.0.0.9.
2. Load the extracted ROM file from the one .zip you downloaded.
3. Select the connected device and begin the flashing process.
4. Wait for the process to complete successfully.

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🎯 Result:

• The device successfully boots up
• IMEI and OEM data are retained
• No need for additional configurations

📝 Note:

• This method is safe for dead-boot recovery only.
• Ensure you use Sigma Box to enter Fastboot; other tools may not preserve IMEI/OEM.
• This method is tested on version 1.0.0.80 firmware only.