If you don't have your unlock code yet you can try:

http://stores.shop.ebay.com/Primo-Mobile-Unlock__W0QQ_armrsZ1

Sierra Wireless Aircard

Please download and install Sierra Watcher.  Once you have Watcher installed put the non-Cingular SIM into the card and Watcher will prompt you to enter the unlock code. Please make sure to enter the unlock code correctly.