Zain carrier of Saudi Arabia has recently launched a new Huawei device, the E5577s-321. It can also be unlocked, but since it has Auth V4 algorithm, you need to flash the device first then only unlocking is possible. After unlocking you can use all network providers SIM around the world. You can purchase this device in Kuwait and Saudi Arabia.

Unlocking of Huawei (E5577) E5577s-321 Zain device is a big process, and it takes at least 30 minutes. Currently, firmware with WebUI is available and can be unlocked.

Download the following required files which will be used in the process of unlocking of Huawei E5577s-321:

  1. Firmware Update Huawei E5577s-321 (General)
  2. Huawei Firmware E5577s-321 Update 21.316.01.00.00 (Universal)
  3. Latest Huawei Mobile Partner for drivers
  4. Universal Master Code Tool to generate firmware code or you can also leave comment
  5. DC unlocker

How to Unlock Huawei E5577s-321 Zain mobile WiFi router?

1. Install latest Huawei mobile partner.

2. Use universal master code tool to generate firmware code through Huawei tab or comment below to get the firmware code/password.

3. Reset the Huawei E5577s-321 and connect to Windows PC with its default data / USB cable.

4. Run firmware update E5577s-321

5. It will put your device in download mode and detect your device.

6. Now the E5577s-321 router will ask you password, input the firmware code which you have already got in Step 2.

7. Wait till finish wizard.

8. Now install DC unlocker.

9. Detect your Huawei E5577s-321 Zain router under it.

10. Copy and paste the below command at the end of the result:

β€œAT^NVRDEX=50503,0,128” (without quotes) and press Enter from the keyboard.

11. It will generate some NV codes in hash format.

12. Copy all the details and the same time pay 6 USD through PayPal. Once paid, I will ask you about hash code through email. NCK / unlock code will be generated accordingly for E5577s-321 device and will be emailed back.

Note I: Don’t proceed with further steps without instruction, otherwise your device may not work with other SIM card.

Note II: After getting the unlock code, update the device with Huawei firmware E5577s-321 v21.316.01.00.00; which you have already downloaded.

Update: Viva Bahrain has also launched Huawei E5577s-321 that comes with hardware version CL1E5573SM02, firmware and Web UI It is unlocked successfully.

Update II: Huawei E5577s-321 is also available by Tele 2 (Sweden) which is running with firmware Above procedure will work on this router also.

Update III: Zain SA has launched a brand new E5577s-932. Huawei E5577s-932 Unlocker app is available.


  1. Hi there,
    I have purchased this router originating from Tele 2 (with firmware). DC unlocker showed that the device was unlocked, but it was constantly displaying the No service error. I have updated the firmware and the WebUI, and now it won’t boot. Although the device is detected in Device manager, the DC Unlocker is showing Modem not found message. I have tried with the alternate bootloader, still no success.
    Any ideas how to fix this? (or at least where to find the original firmware, to try reverting back to the original state and experiment with another solutions)

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