All plans for phones include unlimited calling from the U.S. to Mexico and Canada and unlimited text from the U.S. to over 200 countries. You can also talk, text and use data in Mexico and Canada with no roaming charges. Pay-per-use rates apply to calls from the U.S. to other countries unless you have an appropriate add-on feature. Learn more about international add-ons.(https://www.business.att.com/categories/international-add-ons.html)