Unlock K3715 3G USB Customised Firmware Modem via Firmware upgrade process – I have already provided unlock solution for un-customized Huawei K3715 3G USB modem in this article. If through this article you can not unlock your Huawei K3715 modem then you need to flash your modem firmware. To unlock the customised firmware Huawei K3715 3G USB modem you need some software which download link is provided at the end of the article.
Vodafone K4305 Huawei Modem Dongle
Vodafone Huawei Modem

Step by step guide to unlock Huawei K3715 customised firmware modem :

  1. Download the all software from the download link which is provided at the end of the article.
  2. Now disconnect from the internet and close the default dashboard of Huawei modem.
  3. Now run the firmware update and when ask for password put flash code of your IMEI.
  4. Now wait till finish.
  5. Now run the dashboard update and go till finish.
  6. Now close all the running software and eject the modem from PC.
  7. Now change the sim other than default and connect your K3715 modem again to PC.
  8. Now close the running software and run Huawei Modem code writer tool.
  9. Now detect the com port and click on unlock button.
  10. Now provide 8 digit unlock code and click on OK.
  11. Now your modem is unlocked forever.