Zain Saudi Arabia has launched Huawei E5577 sub-model Huawei E5577s-321 with the firmware version Unlocking of Zain Huawei E5577 is possible by firmware change. We have even shared the free unlocking of Zain Saudi Arabia Huawei E5577S-321.

Now, Zain Saudi Arabia has upgraded the firmware of Huawei E5577s-321 from to 21.327.62.00.375. It is highly secured firmware and previous unlocking file will not work on this latest firmware of Huawei E5577. This post will help to unlock this suborn router.

How to Unlock Zain Saudi Arabia Huawei E5577S-321 (Firmware 21.327.62.00.375)?

1. Download the unlocking file of Zain Saudi Arabia Huawei E5577S-321.

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

3. Unlocking app of Zain Saudi Arabia E5577S-321 will generate the hardware ID. Copy and keep in a notepad file.

4. Now pay 10USD at PayPal, while paying mention model with IMEI in the transaction.

5. Our team member will ask for generated hardware ID.

6. Once the correct details will be received, he will provide the registration details.

7. Once you are ready with key, download Huawei latest drivers.

8. Unzip using WinRAR software and run the driver setup file.

9. It will install the correct drivers in background.

10. Now download and run DC unlocker software.

11. Click on Search Magnifying Glass.

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

13. At the end of the result, in a new line, paste the following:


14. Press Enter from the keyboard.

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

16. Now run the Zain Saudi Arabia Huawei E5577S-321 unlocking file, which you have already downloaded.

17. Fill the registration name and key which you have got by our team.

18. Click Register to start flashing the firmware of your Zain Saudi Arabia Huawei E5577S-321 dongle.

19. Once flashing completed, again detect the device in DC unlocker software.

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


21. Press Enter from the keyboard.

22. A response will come as OK.

Now your Zain Saudi Arabia locked Huawei E5577S-321 (Firmware 21.327.62.00.375) is unlocked permanently to use with all sim cards.

Note: Before running this app, change the Zain sim with any another network provider simcard. Then only proceed.


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