Not sure what you mean.
When you say Burlington, is this the one in Ontario?
If it is, I am not sure if AT&T in Burlington would work out for you. Maybe I didn't get that part right.
Anyway, the system does work. I am from Ontario and currently traveling. I am in West Palm Beach right now as I type using 3G from AT&T.
I landed in Georgia, went to the local Walmart, bought the AT&T microsim card, inserted it. I also bought a prepaid credit card. I have to admit, I wasn't so sure about that part because the card had Walmart written on it and said it could' be used outside of the country. I was of the feeling that a prepaid gift credit card would work anywhere.
I tried to connect the service but it wasn't working at first because I had not registered the card online. After I did that, everything has been working smoothly. The one problem I am having, minor though it may be, is that when I am in some areas in Georgia I only get Edge service instead of 3G. Other that, the system works.
I am not sure but maybe what you should try doing is do all your hook ups in the country you plan to use the service.