Sunday, 20 January 2019

How to Write IMEI and SN Number to a Huawei Modem or MiFi

This is a step by step guide showing how to fix / write IMEI and SN number to a Huawei Mifi. Null IMEI on a huawei mifi is usually the result of tampering with the NVM, those who unlock their devices by flashing USBloader will notice that the device no longer has a valid IMEI or SN.

The device might still connect to the internet and work properly BUT it will no doubt be better to have everything in perfect condition.


  • Download and install HxD Editor
  • Download DC Unlocker
  • Huawei MiFi with corrupted IMEI and SN number
  • USB cord
  • The guide assumes that you already installed the necessary drivers before now. If you haven't done so then search online for, download and install the necessary drivers for your device.

How to Write IMEI and S/N to a Huawei MiFi

The steps below explain how write IMEI and S/N to a huawei mifi and fix invalid / null IMEI
  1. Disconnect the device and insert a working sim of your choice (you'll get an error message if you try writing IMEI without a SIM card inside the device)
  2. Power on the device and connect to the PC using a USB cord
  3. Now run DC-unlocker
  4. Select Huawei modems > Use auto detect > Click the search button


  5. The device should be detected and all information displayed


  6. Now type the code below and hit Enter

    where ***** is the 15 digit original IMEI gotten from the carton of your device


  7. You should get "OK" meaning the IMEI was written successfully
  8. To write SN number, Launch HxD editor > press "control + N" to open a new file
  9. Type the original serial number gotten from the carton of your device into the right hand side and the hex value should be displayed in the middle


  10. Now type the code below into DC-unlocker and hit Enter
    AT^NVWR=6,16,** ** ** ** ** ** ** ** ** ** ** ** ** ** ** **

    where ** ** ** ... is the hex value gotten from HxD editor

  11. You should get "OK" meaning the SN number was written successfully


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