Unlocking solution of Huawei E5785Lh-92a (Zain Saudi Arabia) router is available. It is tested with firmware version 21.235.01.00.375 and WebUI version 21.100.29.01.375. It is a totally safe solution, means your device NV RAM will be not erased during this process.
To unlock the device, you have to open the physical screws of the device, you can see the below images for reference:
How to Unlock Huawei E5785Lh-92a (Zain Saudi Arabia) Firmware 21.235.01.00.375?
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, 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 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 run the Loader file again.
12. Fill 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 will be available in device manager, refer 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) will be unlocked permanently to use with all network provider sim cards.