I have the At&t Unite, and was having trouble with nat type. After many hours of talking to techs i came to the conclusion i would have to purchase a aircard modem and router, so i did. Now i have the aircard modem and cradlepoint mbr1200b. On the router i have all ports necessary and tried dmz. plus enabling dchp and on and on. So again many hours of talking to techs cradlepoint told me i needed a static ip that it was only way to open or get a moderate nat. We run our business from our home called at&t and was told the form to fill out for a static ip no longer exsisted. I NEED HELP please!