This article will help you : How to unlock your Huawei’s USB 3G
Go to : http://a-zgsm.com/huawei.php
Click the photos to view
When the website Huawei calculate code online calculate code, it will show : Flash code and Unlock code.
Download software Huawei modem code writer .
Unzip and run it. Plugin your modem, detect and when it ask Unlock code, fill unlock code and have funs .
If it show : Error , it’s mean your USB use new Firmware so that pls go to DC-Unlocker.Com and ask them : HOW to unlock USB 3G with FEE .