1. Download the E5573cs-322 USB loader file

2. Dismantle or unscrew the device.

3. Let the battery inside the device and switch off the router.

4. Connect USB cable to router.

5. Touch the boot pin and ground of the board from any metal / wire as shown in above image.

6. From the other hand, insert USB cable another end to PC.

7. It will produce a sound and you will see something is installing on your device.

8. Remove the metal / wire from the board.

9. Now download Balong tool.

10. Install the latest “Huawei mobile partner“ on your computer.

11. Run Balong tool.

12. Click “Detect” button. It will show COM Port with “BOOT_3G”.

13. Locate the “Loader” file which you have got in the email.

14. Click on “Load”.15. Once progress bar reaches the end, you will again notice something is installing on your PC.

Note: You can check in COM ports, you will see two Huawei ports.

16. Close the USB Balong tool now.

17. Now download E5573cs-322 firmware version 21.318.99.03.00.

18. Run the Exe file and update your device.