Check out this thread:
http://www.prepaidgsm.net/forum/mobi...odems-web.html
And yes, it works, it's absolutely free and there's absolutely no security risk - you don't need to download anything, you don't need to share any personal data or provide a credit card - you just enter the IMEI (serial number) which you'll find on the back of your stick and after a click you'll get your unlock code.
In order to actually unlock your stick, insert a SIM card from any other operator and after starting Mobile Partner you will be required to enter your SIM's PIN code (unless disabled) and afterwards the unlock code
et voilą.