What's your rate plan? Unless it states local minutes, your calls will be good nationwide. Then you might have daytime minutes for use before 5pm. Those will be used up for incoming and outgoing calls. Once they're up, you will be charged a 50 cent per minute overage barring you having an older plan. When you get into unlimited evenings Or have an unlimited plan, you won't get charged at all. Of course this assumes calls placed while you're in Canada and to Canadian numbers. Calling while roaming or internationally has its own additional fees.