Even though the international call rates and SMS charges for different countries
and locations depend on the local mobile service provider, buying and maintaining an international SIM card like Matrix is still a much more affordable solution, since you would have a one touch access to countries around the world. In normal usage, that leads to comparable rates with a regular connection, if not less. So basically, there is only benefit in going for such a service, since the former would not be as affordable while traveling. In short, an international SIM card is a must for all kinds of travelers, since what could be better than visiting your favorite destinations and saving money while keeping in touch!