There are tons of business people and travellers who regularly travel between the US and Canada. As of now there are only three options for cell phone usage. 1. Turn off their phone. 2. Get a national Sim card from a different carrie . 3. Pay ridiculously high roaming rates. I think a Canadian and US carrier should team up together to provide service free of roaming charges within Canada and the US. I think a many people would be willing to pay a marginal premium for this.