How to Update the Firmware of Huawei Airtel E173U-1?
1. Double-click on the downloaded file. and accept the terms and conditions to go ahead.
2. Accept the terms and conditions then click Next.
3. The firmware will start searching your modem.
4. After detection of the modem is complete, it will ask you for update password.
5. Input here firmware code, according to your IMEI.
6. After a few minutes, it will update your Huawei E173 Aircel modem to the latest firmware.
Note: Before proceeding to the above steps make sure that you have much backup in your UPS. Any power failure will make your device dead.
After updating the firmware you can now unlock your modem through the normal procedure using Huawei modem code writer tool or Cardlock Unlock tool.