Unlocking solution of Zain Saudi Arabia, Huawei E5785Lh-92a router, is available. It comes with firmware version 21.236.01.00.375 and WebUI 21.100.32.00.375. It is tested with one router and working fine. It is a totally safe solution, which means your device’s NV RAM will not be erased during this process. Earlier, we had also unlocked Zain E5785Lh-92a, which comes with firmware version 21.235.01.00.375.

Note: During the process, the battery will be inside the device only.
To unlock the device, you have to open the physical screws of the device, and you can see the below images for reference:
How to Unlock Huawei E5785Lh-92a (Zain Saudi Arabia) Firmware 21.236.01.00.375?
1. Download the Huawei E5785Lh-92a (Zain Saudi Arabia) unlocking file.
2. Extract it using WinRAR software on your PC.
3. Run the file with the name of Loader.
4. It will generate the hardware ID.
5. Copy the hardware ID and pay 10USD at PayPal. While paying, mention model, a network of the device, and hardware ID.
6. Within 8 hrs, you will receive the registration name and key.
7. Now dismantle the device as shown in the above image.
8. With a twizzer or metal, touch and hold both points (Refer image).

9. Now connect to PC.
10. You will hear a sound and find something is installing your PC (You can see on the right sidebar of your PC screen) (It will create a Huawei COM port in Device Manager).

11. Now rerun the Loader file.
12. Fill in the required information, which you have got in your email.
13. Click Register.
14. The file will be processed automatically, and again you will see something is installing on your PC.
15. Wait for 2 minutes to finish (You will see some COM ports available in device manager, refer to the below image).

16. Now run the first firmware file, then update the WebUI (both are available in the same folder).
17. Again, boot the device and run the second firmware file.
Once the second file is completed successfully, your Huawei E5785Lh-92a (Zain Saudi Arabia / Firmware 21.236.01.00.375) will be unlocked permanently to use with all network provider SIM cards.