Vivacom Bulgaria has recently launched a new 4G LTE modem, the Huawei E3372H. This sub-model of Huawei E3372H comes with firmware version 21.317.01.00.738. It is highly secured firmware, and there is no direct procedure to change the firmware to a universal one for unlocking.

Our team has modified this firmware of Vivacom Bulgaria Huawei E3372H (Firmware 21.317.01.00.738), and now it can flash the firmware to a universal one. This means unlocking of Vivacom Bulgaria Huawei E3372H is now possible without opening the screws of the device.

Earlier also, our team had modified the firmware of MTN Ghana E5577s-321, which comes with firmware version 21.328.62.00.429 / 21.326.62.00.429 and WebUI version / It can also be unlocked without opening the screws.

This modified file will work up to the firmware version 21.328.62.01.429, which comes in Vivacom Bulgaria Huawei E3372H modem.

How to Unlock Vivacom Bulgaria Huawei E3372H (Firmware 21.317.01.00.738)?

1. Download the unlocking file of Vivacom Bulgaria Huawei E3372H from the link provided at the end of this post.

2. Run on any Windows PC (32-bit or 64-bit / Win XP, Win 7, or Win 10).

3. Unlocking tool of Vivacom Bulgaria Huawei E3372H will generate the hardware ID. Now pay 6USD at PayPal and mention all the details.

4. Our team will provide the key according to the hardware ID.

5. Once you are ready with the key, download Huawei’s latest drivers.

6. Unzip using WinRAR software and run the setup file.

7. It will install the correct drivers in the background.

8. Now download and run DC-Unlocker software.

9. Click on Search Magnifying Glass.

10. It will detect your device and show complete details.

11. At the end of the result, in a new line, paste AT^GODLOAD.

12. Press Enter from the keyboard.

13. Wait for 10-second to load the drivers.

14. Now run the Vivacom Bulgaria Huawei E3372H unlocking file, which you have already downloaded.

15. Fill in the registration name and key which you have got from our team.

16. Click Register to start flashing the firmware of your Vivacom Bulgaria E3372H dongle.

17. Once the flashing is completed, again detect the device in DC-unlocker software.

18. At the end of the result, paste the following:


19. Press Enter from the keyboard.

A response will come as OK.

Now your Vivacom Bulgaria locked Huawei E3372H (Firmware 21.317.01.00.738) is unlocked permanently to use with all sim cards.

You can also unlock MTS Serbia Huawei E3372H-153 (Firmware



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