GPS SmartSoles purchased in the U.S. will work in the U.S., Canada, and Mexico, where there is sufficient 2G cellular service. In the United States, the GPS SmartSole works across all 50 states using the T-mobile 2G cellular network. In Canada, it uses the Rogers network. To get a general idea of the coverage in your area, check out a cellular coverage map such as the one provided by Open Source.