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Huawei E173 is a 3G USB modem which support 7.2 mbps download speed and 5.7 mbps upload speed. This Modem can cost you in Local Market between Rs. 2800 to Rs. 3000. So Huawei let us see how to unlock huawei E173 data card.
How to Unlock Huawei e173 Modem

1. First get Huawei E173 Firmware Download.
2. Now Generate Unlock Code using Huawei code calculator  (Read :- How to generate Unlocking Codes For Huawei Modems ) Or Follow Step 3.
3. (Optional) Download Universal Master Code.exe. Enter your 15 Digit IMEI number as shown in the below screen and generate your Unlock Code and Flash Code.
   

   
   Example: From IMEI number (353474024585481), I have generated unlock code (60684032) and flash code (58346543).

4. Plug-in your data card with your laptop or desktop (No need to remove sim card from the modem).
5. Once your data card is detected in your just double click on E173Update_11.126.85.00.114_B427.exefile and it will find the data card and start processing.
   
   Searching for Huawei Device
   Universal Master Code Generator Will give you Unlock code and Flash Code
6. After above screen it will ask you for the unlock code, at this time you need to give FLASH CODE as your password or unlock code and then your data card software upgrade will be done successfully.
7. Now Download and install Huawei Mobile Partner Software, it will work on Windows XP, Windows Vista and Windows 7 as well.
8. Now Open the Huawei Mobile Partner from the desktop, and if asked use your unlock code you have generated in the step 2.
9. Create new profile for you network provider (Using APN and User name and password), try to connect to the internet now.