To make an international call, dial the International Direct Dialing, and then the country code, the city code and the phone number. Calling Canada and other Caribbean islands is similar to making local phone calls. Simply dial 1, the area code and the contact number.
Some countries may have a different process, so it is necessary to check with your service provider. For example, calling Mexico requires the addition of 1 to the country code. In some cases, the process of calling via a mobile phone may be different from that of using a landline. Using a mobile phone may also be more costly than a landline. Check with your service provider to learn about the current calling rates.