@ighsaw as everyone already mentioned there's no such thing as Canada roaming charges with PM. Technically there's no such thing as any charges with PM. Whatever you pre-purchase is the service you will have access to. If your plan does not include data, then you phone won't be able to use the Internet (unless you're on Wifi). If you tried using the internet on your phone without pre-purchasing the service,m then the internet just won't work. If you tried calling an eligible long distance number without pre-purchasing the long distance service, then the call won;t be connected. PM does not have overage charges or such usage fees. A lot of people confuse PM with PC Mobile (maybe that's what they were thinking of.
However, please note, that when making an eligible call outside your area code you will get an annoying automated message (i.e. calling from Toronto to Vancouver for example), just ignore the automated message and the call will go through once it's finished.
