Yes, that's the way they work. We have the Verizon broadband card and plug it into the Cradlepint and it works thru the house and on the patio, too. Even more, we recently went to Minnesota and put the Cradlepoint in the closet on the shelf in the Montana, plugged it into our invertor and wi=fi all the time we were traveling in the truck. Grandson was traveling with us and had his IPOD touch and used it, I used it with my laptop. Our service is with Verizon, but I'm sure it would be comparable with AT&T as well. Folks from her recommended the Cradlepoint and that's why we went with it. They offer great customer service as well.
Sandy
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