Do it yourself approach to download and install software to unlock your USB INTERNET MODEM.Visit
http://www.gistishere.com
Thanks for giving information.
For me using network unlock code is the best way to unlock internet(Huawei) modem.Recently i unlocked my modem using this way.I bough an unlock code from Mobileunlocksolutions.com They provided my unlock code through e-mail.So i easily unlocked my modem within a day.