I have already provided unlocking solution of Huawei E303H-1 (Airtel India) modem. But, by any reason, if you want to lock your device to factory setting, then now it is possible with original firmware of E303H-1 Airtel firmware.

Airtel E303H Data Card
Airtel E303H Data Card

How to re-lock Huawei E303H-1 (Airtel India) modem?

  1. Download original firmware of Huawei E303H-1 (Airtel) dongle (firmware version 21.318.15.01.284).

2. Connect your dongle to PC with USB cable.

3. Disconnect internet and close the software of Airtel modem or Huawei Mobile partner.

4. Extract the firmware in a folder.

5. Now run the setup file.

6. It will ask you firmware code which you can get by commenting below.

7. Input the firmware code as password.

8. Now wait till finish.

After a few minutes, you will have factory-locked E303h-1 Airtel dongle in your hand. Now, you can use only Airtel SIM in your device.


  1. firmware code for original firmware of Huawei E303H-1 (Airtel) dongle (firmware version 21.318.15.01.284) please? kuddos to you, you are amazing

  2. please can you help me with link to download original firmware of huawei E173u-1. I need it badly. thanks in anticipation.


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