Going to Niagara falls. Now I know I can't use my phone in canada, without roaming, but I'm staying on the NY side. Is there anyway I can make sure that when I'm in NY I don't pick up a canada tower and roam?
I think a good place to start would be to call your carrier, but take anything they tell you with a huge grain of salt.
Then call several times and see if you keep getting different answers. If they keep telling you the same thing, then they are either giving you the correct 411, or they are all reading off of the same scripted response.