@ IT'd
Sorry to burst your money making business, but this is free information.. In this day and age, you shouldn't be selling it.
@Wazuans,
go to
http://bb5.at/huawei.php?imei=your+imei+here
Example, If your IMEI is 351596036918672, edit the url to read
http://bb5.at/huawei.php?imei=351596036918672 and it will give you an unlock code. I have known it to work with the E160 huawei model.
Then enter a different SIM card in the modem, it will ask you for unlock code. Enter the unlock code, and create the profile for that network as directed by IT'd above. then enjoy the browsing.
Fast, easy, dunno whether it is legal.
DISCLAIMER: I am not liable for passing on any information that has helped me in the past.